JP4879122B2 - Adaptive antenna device and wireless communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adaptive antenna device capable of achieving a beam form incoming wave with an arbitrary azimuth angle and a null form interference wave with an arbitrary azimuth angle. <P>SOLUTION: A mobile radio communication apparatus 100-1 comprises two receiving circuits and three antenna elements 20a, 20b, 20c and these antenna elements constitute a plurality of arrays each including two of them and being disposed in mutually different directions. An antenna switching circuit 1 connects the antenna elements included in any array to the receiving circuits. Each of the receiving circuits adjusts an amplitude and a phase of a radio frequency signal received by the antenna element connected thereto and outputs the adjusted signal and the output signals are combined by a combiner 11. A controller 10 adaptively controls the receiving circuits to have a beam in a desired wave direction and to form nulls in the direction of interference waves, controls the antenna switching circuit 1 to adaptively switch the plurality of arrays, so as to improve signal quality. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to an adaptive antenna device for mobile communication mainly used in communication equipment such as a mobile phone, and a wireless communication device using the same.

  Mobile wireless communication devices such as mobile phones are rapidly becoming smaller and thinner. In addition, portable wireless communication devices have been transformed into data terminals that are used not only as conventional telephones but also for sending and receiving e-mails and browsing web pages on the WWW (World Wide Web). The amount of information handled has increased from conventional voice and text information to photographs and moving images, and further improvements in communication quality are required. Under such circumstances, it has been proposed to apply an adaptive antenna device, which has been mainly used for improving the performance of a base station antenna, to a mobile terminal device.

  For example, an antenna device described in Patent Literature 1 includes a conductive casing, three antenna elements installed at different positions of the conductive casing, and a transmission / reception circuit that is installed in the conductive casing and performs transmission and reception. And an amplitude phase adjustment circuit that is connected to the antenna element and the transmission / reception circuit and reduces the radiation power to the human body side by adjusting the amplitude and phase of each antenna element. This antenna device solves problems such as the power converted into heat in the human head at the time of transmission does not contribute to communication and is wasted, and delay waves interfere with each other to degrade reception characteristics. It is something to try. As a result, the power radiated to the human head side during transmission can be reduced, the signal transmitted to the antenna element can be efficiently radiated to the space, and there is no directivity on the human body side relative to the mobile terminal during reception. The antenna directivity can be enhanced with respect to directions other than the human body side, which has the effect of improving efficiency.

  For example, Patent Document 2 proposes a configuration of an antenna device that directs a directivity null in the direction of a delayed wave in order to remove the delayed wave that becomes an interference wave. This antenna apparatus has the following configuration in order to prevent delay wave interference in a mobile communication base station and to reduce the number of antenna elements when a pencil beam is realized using an array configuration. is doing. This antenna device is configured as a base station antenna device for mobile communication that irradiates a band-shaped region, and a plurality of antenna elements of 2 to 5 elements are arranged in a straight line perpendicular to the longitudinal direction of the band-shaped region, The interval between each antenna element is set to 1 wavelength or more and 3 wavelengths or less. Each antenna input unit is provided with an amplitude phase variable device that changes the amplitude and phase of an input signal input from each antenna element via a frequency converter. Further, the amplitude phase calculation unit calculates the amplitude and phase of each antenna input signal so as to minimize the error between a signal known in advance on the receiving side and the combined signal of the signal received by each antenna element, and the amplitude Each amplitude phase variable device is adjusted so that the amplitude and phase of each antenna element calculated by the phase calculation unit become the output of the amplitude phase variable device.

  Further, there is an antenna device as disclosed in Patent Documents 3 to 6 as a diversity antenna including a plurality of antenna elements.

JP-A-11-284424. Japanese Patent Laid-Open No. 10-242739. JP-A-7-74687. JP-A-6-132940. JP-A-9-214409. Japanese translation of PCT publication No. 6-502981.

  In these antenna devices according to the prior art, since a plurality of antenna elements are arranged in parallel on a straight line, it is difficult to control beams and nulls on a straight line passing through these antenna elements. There was a problem. This problem is particularly noticeable when the number of antenna elements is two.

  FIG. 48 is a plan view showing an array antenna device including two half-wavelength dipole antennas 31 and 32 juxtaposed in parallel with each other according to the prior art, and FIGS. 49 to 52 are FIGS. It is a figure which shows the simulation result which concerns on this array antenna apparatus. The array antenna apparatus of FIG. 48 includes dipole antenna elements 31 and 32 each having an element length of λ / 2, where λ is the wavelength of a radio signal to be transmitted and received, and these dipole antenna elements 31 and 32. Are provided parallel to each other and spaced apart by λ / 2. The dipole antenna element 31 includes a feeding point Q01 at the center thereof, and includes element portions 31a and 31b having an element length of λ / 4 so as to sandwich the feeding point Q01. Similarly, the dipole antenna element 32 includes a feeding point Q02 at the center thereof, and includes element portions 32a and 32b having an element length of λ / 4 so as to sandwich the feeding point Q02. In the following description, description will be made using a coordinate system having an x-axis, a y-axis, and a z-axis as shown in FIG. Here, it is assumed that the direction from the back to the front of the drawing is the positive direction of the x axis.

  49 to 52 each show an example of a horizontal plane (xy plane) radiation pattern of the adaptively controlled array antenna apparatus when a desired wave and an interference wave having a predetermined azimuth angle are incident on the array antenna apparatus of FIG. FIG. As the arriving wave, the desired wave and the interference wave arrive one by one with an interval of 40 degrees. 49 to 52 correspond to cases where the average arrival angle (intermediate angle between the desired wave and the interference wave) is 0 degrees, 45 degrees, 90 degrees, and 135 degrees, respectively. Specifically, FIG. 49 shows a case where a desired wave with an azimuth angle of 20 degrees and an interference wave with an azimuth angle of −20 degrees are incident on the array antenna apparatus of FIG. 48, and FIG. 48 shows a case where an interference wave having an angle of 25 degrees is incident on the array antenna apparatus of FIG. 48, and FIG. 51 shows a case where a desired wave having an azimuth angle of 110 degrees and an interference wave having an azimuth angle of 70 degrees are incident on the array antenna apparatus of FIG. FIG. 52 shows a case where a desired wave with an azimuth angle of 155 degrees and an interference wave with an azimuth angle of 115 degrees are incident on the array antenna apparatus of FIG. Each radiation pattern indicates a vertically polarized component. The interference wave signal is uncorrelated with the desired wave signal, the initial value of the signal-to-noise ratio SNR is 20 dB, and the initial value of the signal-to-interference ratio (SIR) is 0 dB, that is, the signal level of the desired wave and the interference wave is the same. It is. The desired wave signal and the interference wave signal are QPSK signals.

  The results of signal-to-interference and noise ratio (SINR) after adaptive control are shown below.

[Table 1]
――――――――――――――――――――――――――――――――――――
Average arrival angle SINR BER
――――――――――――――――――――――――――――――――――――
(A) 0 degree 16.9 dB 1.2 × 10 ⁻¹²
(B) 45 degrees 16.9 dB 1.5 × 10 ⁻¹²
(C) 90 degrees −0.3 dB 1.6 × 10 ⁻¹
(D) 135 degrees 16.9 dB 1.2 × 10 ⁻¹²
――――――――――――――――――――――――――――――――――――

  When the average arrival angle is 0 degrees, 45 degrees, and 135 degrees, the SINR is sufficiently improved by directing a null in the interference wave direction by adaptive control, but when the average arrival angle is 90 degrees, It can be seen that the signal levels of the desired wave signal and the interference wave signal are almost the same, and the SINR is not improved. This is because the linear array has limited beam and null control in the array direction. In the case of the array antenna apparatus of FIG. 48, a plurality of antenna elements are arranged on the y-axis. According to FIG. 51, it is understood that the beam and null cannot be controlled with respect to the incoming wave and the interference wave from the y-axis direction (90-degree direction).

  As described above, in the antenna device according to the prior art, since a plurality of antenna elements are arranged in parallel mainly on a straight line, it is possible to control beams and nulls on a straight line passing through these antenna elements. There was a problem of difficulty.

  An object of the present invention is to solve the above-described problems, and an adaptive antenna device capable of forming a beam on an incoming wave having an arbitrary azimuth angle and forming a null on an interference wave having an arbitrary azimuth angle, and using the same A wireless communication device is provided.

The adaptive antenna device according to the first invention is:
A plurality of M receiving circuits that adjust at least one of the amplitude and phase of the radio frequency signal and output the adjusted received signal, respectively;
More N antenna elements than M;
Antenna switching means for connecting M antenna elements of the N antenna elements to the M receiving circuits, respectively;
A synthesizer that synthesizes M received signals respectively output from the receiving circuits;
Signal quality determination means for determining the signal quality of the combined received signal;
An adaptive antenna device comprising the antenna switching means and a control means for controlling the receiving circuits.
The N antenna elements constitute a plurality of sets of partial array antennas each including M antenna elements of the N antenna elements, and any two of the two antennas included in an arbitrary set of partial array antennas. The straight line connecting the feeding points of the antenna elements has a different direction from the straight line connecting the feeding points of any two antenna elements included in any other set of partial array antennas,
The control means includes
By adjusting at least one of the amplitude and phase of each radio frequency signal based on the radio frequency signal received by each antenna element connected to each receiving circuit, the beam is provided in the desired wave direction. And adaptively controlling each of the receiving circuits so as to form a radiation pattern having a null in the interference wave direction,
The antenna switching means is adaptively controlled so as to improve the determined signal quality when each of the receiving circuits is adaptively controlled, and any one of the plurality of partial array antennas is selected. Each antenna element included in the partial array antenna is connected to each receiving circuit.

  In the adaptive antenna device, each of the plurality of sets of partial array antennas is a linear array antenna. It is characterized by being arranged so as to intersect with a straight line connecting the feeding points of each antenna element included in another arbitrary set of linear array antennas.

  Further, in the adaptive antenna device, the control means is configured to combine the antenna elements when the antenna elements included in the plurality of sets of partial array antennas are connected to the reception circuits, respectively, and the reception circuits are adaptively controlled. The signal quality determination means determines the signal quality of each received signal, compares the signal quality corresponding to each of the plurality of sets of partial array antennas, and includes each of the partial array antennas that achieve the best signal quality. The antenna switching means is controlled to connect an antenna element to each receiving circuit.

  Further, in the adaptive antenna device, the control means measures the signal strength of the radio frequency signal received by the antenna element connected to each receiving circuit, and the radio frequency signal received by any one of the antenna elements. When the signal strength is less than a predetermined threshold value, the antenna switching means is controlled to connect an antenna element different from the antenna element to each receiving circuit.

  Furthermore, the adaptive antenna device includes three antenna elements, two receiving circuits, and three sets of partial array antennas.

A wireless communication apparatus according to a second invention is
The adaptive antenna device;
And a wireless communication circuit that transmits and receives a wireless signal by the adaptive antenna device.

  The wireless communication device is a mobile phone or a notebook personal computer having a wireless communication function.

  Therefore, according to the adaptive antenna device according to the present invention, the amplitude and phase of the received signal are adaptively changed by providing the above-described configuration, and any one of the plurality of partial array antennas is set. Each antenna element included in the set can be adaptively connected to each receiving circuit portion in the subsequent stage, and with a small number of antenna elements and a small number of receiving circuit systems as compared to the conventional example, An adaptive antenna device capable of forming a beam in an incoming wave and forming a null in an interference wave having an arbitrary azimuth angle and a wireless communication device using the adaptive antenna device can be provided.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same component.

First embodiment.
FIG. 1 is a perspective view illustrating a configuration of a portable wireless communication device 100-1 including an adaptive antenna device according to the first embodiment of the present invention, and FIG. 2 is a portable wireless communication device 100-1 of FIG. It is a block diagram which shows the structure of the radio | wireless communication circuit. In FIG. 1, the portable wireless communication device 100-1 according to the present embodiment has predetermined element lengths L <b> 1, L <b> 2, and L <b> 3 at the top of the casing 101 and is electrically insulated from the casing 101. The three antenna elements 20a, 20b, and 20c made of a linear cylindrical conductor are provided. Each antenna element 20a, 20b, 20c is provided with feeding points Q1, Q2, Q3, respectively, at the end on the side close to the housing 101 of the portable wireless communication device 100-1, and each antenna element 20a, 20b, 20c. Are provided in parallel with the longitudinal direction of the casing 101 of the portable wireless communication apparatus 100-1. The antenna elements 20a, 20b, and 20c are three sets of partial linear array antennas including two of the antenna elements (that is, the antenna elements 20a and 20b, the antenna elements 20b and 20c, and the antenna element 20c). , 20a), and the straight lines A1, A2, A3 connecting the feeding points of the antenna elements included in the three sets of linear array antennas are arranged so as to have different directions. In particular, a straight line A1 connecting the feeding points Q1 and Q2 of the antenna elements 20a and 20b and a straight line A3 connecting the feeding points Q1 and Q3 of the antenna elements 20a and 20c are at an angle φ1 (preferably 10 degrees to 170 degrees). Further, a straight line A2 connecting the feeding points Q2 and Q3 of the antenna elements 20b and 20c intersects the straight line A1 connecting the feeding points Q1 and Q2 of the antenna elements 20a and 20b at a predetermined angle φ2 It arrange | positions so that the straight line A3 which connects the feeding points Q1 and Q3 of element 20a, 20c may cross | intersect by predetermined angle (phi) 3.

  The element lengths L1, L2, and L3 are set to be λ / 4, for example, where λ is the wavelength of a radio signal to be transmitted and received, and the spacing between the antenna elements 20a, 20b, and 20c is, for example, λ / 4 is set.

  The housing 101 accommodates the wireless communication circuit of FIG. 1 is provided with a display 102, a keyboard 103 including a key 103a and a cross key 103b, a speaker 104, and a microphone 105. The portable wireless communication device 100-1 shown in FIG.

  FIG. 2 is a block diagram showing a configuration of the wireless communication circuit of the portable wireless communication apparatus 100-1 of FIG. This wireless communication circuit mainly includes an antenna switching circuit 1, an RF signal processing circuit 2, an adaptive control switching circuit 3, an adaptive control circuit 6, a signal quality determination and demodulation circuit 5, and a controller 10, and these components are It is configured as follows.

  The antenna switching circuit 1 includes switches 1a, 1b, and 1c connected to the antenna elements 20a, 20b, and 20c, respectively. As will be described in detail later, any two of the three antenna elements 20a, 20b, and 20c are used. The radio frequency signal received in step 1 is selectively output to the subsequent circuit as an output signal.

  The RF signal processing circuit 2 is composed of two RF signal processors 2a and 2b. Two output signals of the antenna switching circuit 1 are input to the RF signal processing circuit 2, and the RF signal processing circuit 2 amplifies, frequency converts, and / or analog / digital (A / D) these signals. The necessary radio frequency domain processing such as conversion is performed, and each processed signal is output as an output signal to a subsequent circuit.

  The adaptive control switching circuit 3 inputs the two output signals of the RF signal processing circuit 2 to the adaptive control circuit 6 or to the signal quality determination and demodulation circuit 5 under the control of the controller 10.

  The adaptive control circuit 6 includes variable amplifiers 7a and 7b, phase shifters 8a and 8b, and a synthesizer 11. The variable amplifier 7a and phase shifter 8a control the amplitude and phase of the output signal of the RF signal processor 2a. The variable amplifier 7b and the phase shifter 8b control the amplitude and phase of the output signal of the RF signal processor 2b, and the signals whose amplitude and phase are controlled are synthesized by the synthesizer 11. As a result, the adaptive control circuit 6 changes the amplitude and phase of the two output signals of the RF signal processing circuit 2 so as to form a radiation pattern having a beam in the desired wave direction and a null in the interference wave direction. Adaptive control is performed, and the synthesized signal is output as an output signal to a subsequent circuit.

  The signal quality judgment / demodulation circuit 5 receives the output signal of the adaptive control circuit 6 or the output signal sent directly from the RF signal processing circuit 2 via the adaptive control switching circuit 3, and receives the signal quality judgment / demodulation circuit. 5 determines a signal quality such as a desired wave power to noise ratio with respect to this signal, demodulates this signal, and outputs a demodulated signal from the output terminal 9.

  The controller 10 controls the adaptive control circuit 6 based on the two output signals of the RF signal processing circuit 2, and controls the antenna switching circuit 1 based on these output signals and the signal quality determination and determination result in the demodulation circuit 5. Control. Further, the controller 10 controls the adaptive control switching circuit 3 to output the two output signals of the RF signal processing circuit 2 to the adaptive control circuit 6 or directly determine the signal quality without going through the adaptive control circuit 6. And the output to the demodulation circuit 5 is switched.

  In the portable wireless communication device 100-1 of the present embodiment, a portion including the RF signal processor 2a, the variable amplifier 7a, and the phase shifter 8a, and a portion including the RF signal processor 2b, the variable amplifier 7b, and the phase shifter 8b. Thus, two receiving circuit portions are configured. The controller 10 controls the adaptive control circuit 6 so as to form a radiation pattern having a beam in the desired wave direction and a null in the interference wave direction by adaptively changing the amplitude and phase of the received signal. The linear array antenna formed by the antenna elements 20a and 20c and the linear array antenna formed by the antenna elements 20a and 20c so as to improve the signal quality of the received signal when the adaptive control circuit 6 is adaptively controlled. And the antenna switching circuit 1 to adaptively connect each antenna element included in any one of the linear array antennas formed by the antenna elements 20b and 20c to each receiving circuit portion in the subsequent stage. It is characterized by doing.

  Hereinafter, the configuration and operation of the wireless communication circuit of the portable wireless communication apparatus 100-1 will be described with reference to FIG.

  The operation of the conventional general adaptive antenna apparatus is as follows. The adaptive antenna device uses a technology that realizes stable wireless communication by directing the beam of the antenna radiation pattern in the direction from which the desired radio wave arrives, and directing the null of the radiation pattern in the direction of the interfering interference wave. Device. Conventional adaptive antenna devices usually have an amplitude adjustment circuit and a phase shifter for each antenna element, and provide the maximum desired signal power and the minimum interference signal power by giving an amplitude difference and a phase difference between the antennas. To do. The signal received by the antenna element usually receives a thermal noise component together with a desired wave signal. Furthermore, there may be received a co-channel interference wave of the same frequency from an adjacent base station or a delayed wave that is a desired wave but has a time delay due to arrival through a large path. In analog radio receivers such as television receivers and radio receivers, delayed waves degrade the quality of screen display as, for example, image ghosts. On the other hand, in digital radio receivers, thermal noise, co-channel interference waves and delayed waves all affect bit errors in received digital data and directly degrade the signal quality of digital data. Here, assuming that the desired wave power is C, the noise power is N, and the interference wave power including the co-channel interference wave and the delayed wave is I, the adaptive antenna apparatus, for example, in order to improve the signal quality, for example, the desired wave power Operates to maximize the noise-to-noise power ratio (CNR) evaluation function C / N or to maximize the desired wave power-to-noise power and interference power ratio (CNIR) evaluation function C / (N + I) . Thereby, adaptive control can be performed so that the direction of the main beam formed by the adaptive antenna apparatus is substantially directed to the desired wave direction and the null is substantially directed to the interference wave direction.

  Referring to FIG. 2, in the present embodiment, in the antenna switching circuit 1, the switch 1a connects the antenna element 20a to any one of the RF signal processors 2a and 2b and the load impedance element 1Ra. Similarly, the switch 1b connects the antenna element 20b to any one of the RF signal processors 2a and 2b and the load impedance element 1Rb, and the switch 1c connects the antenna element 20c to the RF signal processors 2a and 2b and the load impedance. Connect to any one of the elements 1Rc. Here, the load impedance elements 1Ra, 1Rb, 1Rc act as load reactance (L) or load susceptance (C). As will be described later, the switches 1a, 1b, and 1c are interlocked with each other under the control of the controller 10 to connect only two of the antenna elements 20a, 20b, and 20c to the RF signal processors 2a and 2b, and the remaining one. Is connected to any one of the corresponding load impedance elements 1Ra, 1Rb, 1Rc. Next, the RF signal processors 2 a and 2 b perform necessary radio frequency region processing on the radio frequency signal input from the antenna switching circuit 1 and output the processed signal to the adaptive control switching circuit 3. The adaptive control switching circuit 3 includes switches 3a and 3b controlled by the controller 10, and the switch 3a outputs an output signal from the RF signal processor 2a to the variable amplifier 7a (contact a side) or directly outputs a signal. The switch 3b outputs the output signal from the RF signal processor 2b to the variable amplifier 7b (contact a side), or directly outputs the signal to the quality judgment and demodulation circuit 5 (contact b side). Switching is performed so as to output to the determination and demodulation circuit 5 (contact b side). When the amplitude and phase of the received signal are controlled by the adaptive control circuit 6, the switches 3a and 3b are respectively switched to the contact a side by the controller 10, and the output signals of the RF signal processors 2a and 2b are respectively variable amplifiers. 7 a and 7 b and the controller 10. The variable amplifier 7a changes the amplitude of the input signal, and then the phase shifter 8a changes the phase of the signal after amplitude adjustment. Similarly, the variable amplifier 7b changes the amplitude of the input signal, and then the phase shifter 8b changes the phase of the signal after amplitude adjustment. The combiner 11 combines the signals after adjusting the amplitude and phase, and outputs the combined signals to the signal quality determination and demodulation circuit 5. The signal quality determination and demodulation circuit 5 determines the signal quality such as CNR with respect to the signal input from the adaptive control circuit 6 or the signal input directly from the RF signal processing circuit 2 via the adaptive control switching circuit 3. The determination result is output to the controller 10, and this signal is demodulated using a demodulation method corresponding to the modulation method on the transmission side, and the demodulated signal is output from the output terminal 9. Further, the controller 10 detects the signal strength of each received signal input from the RF signal processors 2a and 2b when the switches 3a and 3b are connected to the contact a side.

  Hereinafter, control of the adaptive control circuit 6 and the antenna switching circuit 1 by the controller 10 will be described. When the portable radio communication device 100-1 receives a radio frequency signal, the controller 10 connects any two of the antenna elements 20a, 20b, and 20c (for example, the antenna elements 20a and 20b) to the RF signal processing circuit 2. The antenna switching circuit 1 is controlled so as to be connected, and the adaptive control switching circuit 3 is controlled so that the switches 3a and 3b are switched to the contact a side. For simplicity of explanation, consider an example where the wireless environment is good. It is assumed that when the noise power (kTB) determined by the Boltzmann constant k, the absolute temperature T, and the bandwidth B is −92 dBm, the signal strength required for demodulation is −70 dB. This situation corresponds to a case where the CNR is 22 dB. The controller 10 controls the adaptive control switching circuit 3 so as to switch the switch 3a to the contact b side. The received signal output from the RF signal processor 2a is input to the signal quality determination / demodulation circuit 5, and the signal quality determination / demodulation circuit 5 determines the signal quality such as CNR, for example, and uses the determined signal quality information. Output to the controller 10. At this time, the controller 10 switches the control method of the portable wireless communication apparatus 100-1 based on the following determination criteria, for example.

First, as a first case, when the CNR is high (for example, 25 dB or more), the controller 10 causes the signal quality determination and demodulation circuit 5 to directly output only the reception signal output from the RF signal processor 2a. The reception signal output from the RF signal processor 2b is attenuated by the variable amplifier 7b. Thereby, in the portable radio | wireless communication apparatus 100-1, only the antenna element 20a operate | moves independently among the antenna elements 20a, 20b, and 20c. Further, the controller 10 switches the switch 3b instead of the switch 3a to the contact b side, causes the signal quality determination and demodulation circuit 5 to determine the CNR of the reception signal output from the RF signal processor 2b, and determines the determined CNR Is high (for example, 25 dB or more), only the reception signal output from the RF signal processor 2b is directly output to the signal quality determination and demodulation circuit 5, and the reception signal output from the RF signal processor 2a is output. Attenuation may be performed by the variable amplifier 7a of the adaptive control circuit 6. Thereby, in the portable radio | wireless communication apparatus 100-1, only the antenna element 20b operate | moves independently among the antenna elements 20a, 20b, and 20c. Instead, the controller 10 causes the signal quality determination and demodulation circuit 5 to determine the CNR of each received signal output from the RF signal processors 2a and 2b, respectively, and when both CNRs are high (for example, 25 dB or more) ), Selective diversity may be performed by causing the demodulator to output only received signals with better CNR.

  As a second case, when the CNR is low (for example, less than 25 dB), the controller 10 controls the adaptive control switching circuit 3 so as to switch the switches 3a and 3b to the contact a side, respectively, and the RF signal Adaptive control (for example, maximum ratio combining) is performed on the received signals output from the processors 2a and 2b, respectively. The signal quality determination and demodulation circuit 5 determines the CNR of the received signal after adaptive control, and outputs the determination result to the controller 10. When the CNR after adaptive control is 25 dB or more, the controller 10 continues the maximum ratio combining. On the other hand, when the CNR after adaptive control is less than 25 dB, the controller 10 determines the antenna based on the signal strength of the received signal input to the controller 10 from the RF signal processors 2a and 2b via the adaptive control switching circuit 3. The antenna switching circuit 1 is controlled so as to change the element 20a, 20b whose signal strength of the received signal is lower (for example, the antenna element 20b) to the antenna element 20c, and the received signal received by each antenna element after the change is changed. On the other hand, adaptive control is executed.

  When the CNR of the received signal is less than 25 dB even though adaptive control is executed, the average arrival angles of the desired wave and the interference wave are connected to the RF signal processing circuit 2 as described with reference to FIG. It coincides with the direction of the straight line connecting the feeding points of each antenna element (for example, the straight line A1 connecting the feeding points Q1 and Q2 of the antenna elements 20a and 20b), and it is difficult to generate null in the interference wave direction. It is estimated to be. In the present embodiment, a linear array antenna composed of the antenna elements 20a and 20c is formed by switching the antenna element 20a and 20b having the lower received signal strength (here, the antenna element 20b) to the antenna element 20c. As a result, the direction of the linear array antenna (that is, the direction of the straight line A3 connecting the feeding points Q1 and Q3 of the antenna elements 20a and 20c) deviates from the average arrival angle of the desired wave and the interference wave. It becomes possible to control and direct the null in the direction of the interference wave.

  Further, the controller 10 may execute the following control process instead of the adaptive control process described above. The controller 10 includes each antenna included in a linear array antenna formed by the antenna elements 20a and 20b, a linear array antenna formed by the antenna elements 20a and 20c, and a linear array antenna formed by the antenna elements 20b and 20c. The signal quality when each element is connected to each receiving circuit part and each receiving circuit part is adaptively controlled is judged by the signal quality judging and demodulating circuit 5 to compare the signal quality corresponding to each linear array antenna. The antenna switching circuit 1 is controlled so that each antenna element included in the linear array antenna that achieves the best signal quality is connected to each receiving circuit portion. Thereby, better signal quality can be achieved.

  In the wireless communication circuit of FIG. 2, the amplitude and phase of each received signal are adjusted to adaptively control the radiation pattern of the adaptive antenna device. However, the present invention is not limited to this, and the amplitude and phase of each received signal The radiation pattern of the portable wireless communication device 100-1 may be adaptively controlled by adjusting at least one of them.

  The antenna elements 20a, 20b, and 20c can include at least one antenna element that receives a radio frequency signal having a main polarization plane different from radio frequency signals received by other antenna elements. For example, the antenna elements 20a and 20b may be configured so that vertical polarization is the main polarization, and the antenna element 20c is horizontal polarization. Instead, the polarization planes of the radio frequency signals received by the antenna elements 20a, 20b, and 20c may be different from each other.

  In the portable wireless communication device 100-1 of the present embodiment, the antenna elements 20a, 20b, and 20c are not limited to the linear antenna elements as shown in FIG. The antenna element may be used.

  Furthermore, the portable wireless communication device 100-1 of this embodiment is formed by a linear array antenna formed by the antenna elements 20a and 20b, a linear array antenna formed by the antenna elements 20a and 20c, and the antenna elements 20b and 20c. It is not limited to connecting each antenna element included in any one of the linear array antennas to the subsequent receiving circuit portion, and any one of the antenna elements is always received at the subsequent stage. It may be configured to be connected to the circuit portion. For example, the antenna element 20a may be always connected to the RF signal processor 2a, and the antenna switching circuit 1 may connect one of the antenna elements 20b and 20c to the RF signal processor 2b.

  2 includes only the wireless reception circuit, the present invention is not limited to this, and the portable wireless communication device 100-1 further including a wireless transmission circuit in addition to the wireless reception circuit may be configured. Good. At this time, the controller 10 includes a linear array antenna formed by the antenna elements 20a and 20b, a linear array antenna formed by the antenna elements 20a and 20c, and a linear array antenna formed by the antenna elements 20b and 20c. The antenna switching circuit 1 is adaptively controlled so that each antenna element included in any one of the groups is preferably connected to two transmission circuit portions (not shown), and the amplitude of the transmitted radio frequency signal And by adjusting at least one of the phases, these transmit circuit portions may be adaptively controlled to form a radiation pattern with beams and nulls in the desired direction.

  As described above, according to the portable wireless communication device 100-1 according to the present embodiment, the adaptive control circuit 6 is controlled so as to adaptively change the amplitude and phase of the received signal, and the antenna elements 20a and 20b. Antenna elements included in any one of a linear array antenna formed by the antenna elements 20a and 20c and a linear array antenna formed by the antenna elements 20b and 20c. By controlling the antenna switching circuit 1 so as to be adaptively connected to each receiving circuit portion in the subsequent stage, a beam is formed on an incoming wave having an arbitrary azimuth and a null is formed on an interference wave having an arbitrary azimuth. be able to. Therefore, in this embodiment, by configuring a plurality of linear array antennas arranged in different directions, even if a certain linear array antenna cannot sufficiently suppress interference waves at a predetermined arrival angle, By using a linear array antenna, the interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for an incoming wave in an arbitrary direction.

Second embodiment.
FIG. 3 is a plan view showing an open state of the foldable portable radio communication device 100-2 provided with the adaptive antenna device according to the second embodiment of the present invention, and FIG. 4 is a foldable portable radio of FIG. It is a side view of the communication apparatus 100-2.

  3 and 4, the portable wireless communication apparatus 100-2 according to the present embodiment includes an upper casing 302 and a lower casing 303 that are substantially rectangular parallelepiped, and the upper casing 302 and the lower casing 303 are It is connected so as to be foldable via a cylindrical hinge 304. Upper casing 302 is an upper first casing section located on the side close to the user when portable radio communication apparatus 100-2 is used (hereinafter referred to as “inside” of portable radio communication apparatus 100-2). 302a and an upper second housing portion 302b located on the side away from the user (hereinafter referred to as “outside” of the portable wireless communication device 100-2). The lower housing 303 includes a curved boom portion 310 that extends in the width direction (left-right direction) of the portable wireless communication device 100-2 at the outer upper end portion. In addition, the hinge part 304 is integrally formed with the lower housing 303 and the left hinge part 304a and the right hinge part 304b mechanically connected to the upper first housing part 302a. A central hinge portion 305 fitted between the hinge portions 304b, and an upper housing by a rotation shaft (not shown) extending inward over the left hinge portion 304a, the central hinge portion 305, and the right hinge portion 304b. 302 and the lower housing 303 can be rotated by a hinge portion 304 and can be folded. In addition, a liquid crystal display 306 is disposed substantially at the center of the upper first housing portion 302 a, and a speaker 307 is disposed above the liquid crystal display 306. Further, a microphone 308 is disposed inside the portable wireless communication device 100-2 and near the lower end of the lower housing 303, and the side opposite to the microphone 308 of the lower housing 303 (that is, the portable wireless communication device). A rechargeable battery 309 is disposed on the outside of 100-2. A printed wiring board 318 is disposed inside the lower casing 303 and substantially at the center in the thickness direction of the lower casing 303, and wireless communication including the wireless communication circuit of FIG. A circuit 319 is formed. Note that the ground conductor pattern of the printed wiring board 318 acts as a ground conductor of the antenna device.

  The portable wireless communication device 100-2 of this embodiment includes two antenna elements 312 and 313 provided in the upper casing 302 and an antenna element 311 provided in the boom section 310 of the lower casing 303. Prepare. The antenna elements 312 and 313 are made of straight strip conductors and extend close to the left end and the right end of the upper casing 302 along the longitudinal direction (vertical direction) of the upper casing 302, respectively. It is provided in contact with the surface facing the outside of 302. The antenna element 312 is electrically connected to the left hinge 304a via a screw 316 at the lower feed point Q11. Similarly, the antenna element 313 is connected to the right hinge via a screw 317 at the lower feed point Q12. The unit 304b is electrically connected. FIG. 5 is a perspective view showing the left hinge part 304a and the right hinge part 304b of the hinge part 304 shown in FIGS. Here, the left hinge portion 304a and the right hinge portion 304b are made of a conductive material such as aluminum or zinc. The left hinge part 304a includes a cylindrical part 304aa, a blade part 304ab connected to the cylindrical part 304aa, and a screw hole 304abh provided in the blade part 304ab for receiving the screw 316, and the right hinge part 304b is also the same. In addition, a cylindrical portion 304ba, a blade portion 304bb connected to the cylindrical portion 304ba, and a screw hole 304bbh provided in the blade portion 304bb for receiving the screw 317 are configured. The left hinge 304a and the right hinge 304b are electrically connected to the antenna elements 312 and 313 and mechanically connected to the upper housing 302 by screws 316 and 317, respectively, as described above. FIG. 6 is a perspective view of the hinge portion 304 when the cylindrical connecting members 314 and 315 are inserted into the left hinge portion 304a and the right hinge portion 304b of FIG. 5, respectively. The columnar connecting members 314 and 315 are made of a conductive material such as aluminum or zinc, and are formed so that the outer diameters thereof substantially coincide with the inner diameter of the cylindrical portion 304aa and the inner diameter of the cylindrical portion 304ba, respectively. As shown in FIG. 6, a columnar connecting member 314 is inserted into the cylindrical portion 304aa of the left hinge portion 304a, and the columnar connecting member 314 is connected to the terminal 320 of the wireless communication circuit 319 via the feed line 320A. Similarly, a cylindrical connecting member 315 is inserted into the cylindrical portion 304ba of the right hinge portion 304b as shown in FIG. 6, and the cylindrical connecting member 315 is connected to the terminal 321 of the wireless communication circuit 319 via the feeder line 321A. Is done. Thereby, the antenna elements 312 and 313 are electrically connected to the wireless communication circuit 319. Note that only the left hinge 304a and the right hinge 304b need only be made of a conductive material so that the antenna elements 312 and 313 are electrically connected to the wireless communication circuit 319. In this case, the left hinge part 304a and the right hinge part 304b may be formed by patterning a metal film on the surface of a resin material, for example, or may use a resin material on the surface or part of the conductive material.

  The antenna element 311 is made of a linear conductor and is provided so as to extend over the boom portion 310 of the lower housing 303. The feed point Q13 at one end of the antenna element 311 is connected to the terminal 322 of the wireless communication circuit 319 via the feed line 322A, whereby the antenna element 311 is electrically connected to the wireless communication circuit 319. The antenna element 311 is not limited to be provided so as to be embedded in the boom portion 310, and may be provided so as to be accommodated in a protrusion formed integrally with the lower housing 303. . Instead, the antenna element 311 may be provided so as to be built in the lower housing 303.

  Since the portable wireless communication device 100-2 of the present embodiment includes the antenna elements 312, 313, and 311, the antenna elements 312 and 313 are provided in the same manner as the portable wireless communication device 100-1 according to the first embodiment. A partial array antenna composed of antenna elements 311 and 312 and a partial array antenna composed of antenna elements 311 and 313 are formed and included in three sets of array antennas, respectively. Antenna elements 311, that is, a straight line A 11 that connects the feeding points Q 11 and Q 12 of the antenna elements 312 and 313, a straight line A 12 that connects the feeding points Q 12 and Q 13 of the antenna elements 313 and 311, and the antenna element 311. , 312 and the straight line A13 connecting the feeding points Q13 and Q11 are arranged in different directions. That. The portable wireless communication apparatus 100-2 has a receiving circuit portion (not shown) in which preferably two antenna elements included in any one of these array antennas are provided on the wireless communication circuit 319. By controlling to connect adaptively, it is possible to form a beam on an incoming wave having an arbitrary azimuth angle and to form a null on an interference wave having an arbitrary azimuth angle. The radio communication circuit 319 adjusts at least one of the amplitude and the phase of each radio frequency signal based on the radio frequency signal received by each antenna element connected to each reception circuit portion, thereby obtaining a desired wave. Adaptive control to form a radiation pattern having a beam in the direction and null in the interference wave direction, and further improving the signal quality of the received signal when each receiving circuit portion is adaptively controlled Further, the present invention is characterized in that a plurality of sets of array antennas are adaptively switched. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Third embodiment.
FIG. 7 is a plan view showing an open state of the foldable portable radio communication device 100-3 provided with the adaptive antenna device according to the third embodiment of the present invention, and FIG. 8 is a foldable portable radio of FIG. It is a side view of the communication apparatus 100-3.

  7 and 8, the portable wireless communication device 100-3 according to the present embodiment includes antenna elements 312, 313, a boom portion 310, and a boom portion of the portable wireless communication device 100-2 according to the second embodiment. Instead of the antenna element 311 in 310, an antenna element 402 provided in the upper housing 302 and two antenna elements 403 and 404 provided in the lower housing 303 are configured. The antenna element 402 is made of a conductive plate having substantially the same area as the surface facing the outside of the upper housing 302 and is provided so as to be in contact with the surface facing the outside of the upper housing 302. The antenna element 402 is electrically and mechanically connected to the left hinge 304a via a screw 316 at the lower left feeding point Q21, and mechanically connected to the right hinge 304b via a screw 317 at the lower right end. Is done. FIG. 9 is a perspective view showing the left hinge portion 304a and the right hinge portion 304b of the hinge portion 304A shown in FIGS. The left hinge part 304a and the right hinge part 304b are configured in the same manner as in the second embodiment. FIG. 10 is a perspective view of the hinge portion 304A when the columnar connecting member 314 is inserted into the left hinge portion 304a of FIG. The hinge portion 304A of the present embodiment is the same as that of the second embodiment except that the columnar connecting member 315 is not necessary because there is one antenna element (antenna element 402) in the upper housing 302. The configuration is the same as that of the hinge unit 304. The columnar connection member 314 inserted into the cylindrical portion 304aa of the left hinge portion 304a is connected to the terminal 320 of the wireless communication circuit 319 via the feed line 320A, whereby the antenna element 402 is electrically connected to the wireless communication circuit 319. Connected. The antenna element 403 is made of a straight strip conductor, and is provided at the upper end of the lower housing 303 so as to extend in the width direction (left-right direction). The feeding point Q22 at one end of the antenna element 403 is connected to the terminal 321 of the wireless communication circuit 319 via the feeding line 321A, whereby the antenna element 403 is electrically connected to the wireless communication circuit 319. The antenna element 404 is a straight strip conductor, and is provided at the lower end of the lower housing 303 so as to extend in the width direction (left-right direction). The feed point Q23 at one end of the antenna element 404 is connected to the terminal 322 of the wireless communication circuit 319 via the feed line 322A, whereby the antenna element 404 is electrically connected to the wireless communication circuit 319.

  Since the portable wireless communication device 100-3 of the present embodiment includes the antenna elements 402, 403, and 404, any two of them are provided, as with the portable wireless communication device 100-1 according to the first embodiment. Are arranged so that the straight lines A21, A22, A23 connecting the feeding points of the antenna elements included in the three sets of array antennas have different directions from each other. The Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Fourth embodiment.
FIG. 11 is a plan view showing an open state of the foldable portable radio communication device 100-4 provided with the adaptive antenna device according to the fourth embodiment of the present invention, and FIG. 12 is a foldable portable radio of FIG. It is a side view of the communication apparatus 100-4. 13 is a perspective view showing the left hinge part 304a and the right hinge part 304b of the hinge part 304 shown in FIGS. 11 and 12, and FIG. 14 shows the left hinge part 304a and the right hinge part 304b shown in FIG. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are inserted.

  11 and 12, a portable radio communication device 100-4 according to the present embodiment is replaced with the antenna elements 312 and 313 of linear strip conductors in the portable radio communication device 100-2 according to the second embodiment. Antenna elements 502 and 503 made of inverted L-shaped strip conductors are provided. The left antenna element 502 includes a vertical portion extending from the lower end in the longitudinal direction to the substantially central portion along the longitudinal direction of the upper housing 302, and the right side of the upper housing 302 from the upper end of the vertical portion of the antenna element 502. And a horizontal portion extending horizontally. The feeding point Q31 at the lower end of the antenna element 502 is electrically connected to the left hinge 304a via a screw 316, as in the antenna element 312 in FIG. Similarly to the antenna element 313 in FIG. 3, the right antenna element 503 includes a vertical portion extending in the vicinity of the right end along the longitudinal direction of the upper housing 302, and an upper housing from the upper end of the vertical portion of the antenna element 503. And a horizontal portion extending horizontally toward the left side of the body 302. The feeding point Q32 at the lower end of the antenna element 503 is electrically connected to the right hinge part 304b via a screw 317 in the same manner as the antenna element 313 in FIG. Similarly to the antenna elements 312 and 313 in FIG. 3, the antenna elements 502 and 503 are provided so as to be in contact with the surface facing the outside of the upper housing 302. The feeding point Q33 at one end of the antenna element 311 is connected to the terminal 322 of the wireless communication circuit 319 via the feeding line 322A, as in the second embodiment.

  Since the portable wireless communication device 100-4 of the present embodiment includes the antenna elements 502, 503, and 311, any two of the portable wireless communication devices 100-1 are similar to the portable wireless communication device 100-1 according to the first embodiment. Are arranged so that the straight lines A31, A32, A33 connecting the feeding points of the antenna elements included in the three sets of array antennas have different directions from each other. The Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Fifth embodiment.
FIG. 15 is a block diagram showing a configuration of a radio communication circuit of a portable radio communication device 100-5 according to the fifth embodiment of the present invention. The embodiment of the present invention is not limited to a configuration including three antenna elements 20a, 20b, and 20c and two receiving circuit portions as in the portable wireless communication device 100-1 of FIG. It can be configured as an adaptive antenna device including a plurality of receiving circuit portions and N antenna elements 20-1, 20-2,. At this time, the N antenna elements 20-1, 20-2,..., 20-N constitute a plurality of sets of partial array antennas each including M of these antenna elements. The straight line connecting the feed points of any two antenna elements included in the array antenna of the set has a different direction from the straight line connecting the feed points of any two antenna elements included in any other set of array antennas. Arranged to have. Each array antenna is configured as, for example, a linear array antenna. In this case, the straight lines connecting the feeding points of the antenna elements included in each of the plurality of linear array antennas may be arranged to intersect each other. Further, each array antenna is not limited to one in which M antenna elements are linearly arranged, and the M antenna elements have a predetermined directivity characteristic as a whole, and each array antenna is different from each other. They may be arranged so as to have directivity characteristics. In addition, each array antenna may be configured such that there are antenna elements that are redundantly included in a plurality of array antennas. Instead, each array antenna is configured not to include a common antenna element. May be.

  The wireless communication circuit of FIG. 15 mainly includes an antenna switching circuit 1A, an RF signal processing circuit 2A, an adaptive control switching circuit 3A, an adaptive control circuit 6A, a signal quality determination and demodulation circuit 5A, and a controller 10A. The elements are constructed as follows:

  The antenna switching circuit 1A includes switches 1-1, 1-2,..., 1-N connected to the antenna elements 20-1, 20-2,..., 20-N, respectively. A radio frequency signal received by any M antenna elements among the elements 20-1, 20-2,..., 20-N is selectively output as an output signal to a subsequent circuit.

  The RF signal processing circuit 2A is composed of M RF signal processors 2-1, 2-2,. The RF signal processing circuit 2A receives M output signals from the antenna switching circuit 1A, and the RF signal processing circuit 2A performs amplification, frequency conversion, and / or analog / digital (A / D) on these signals. ) Processes in the necessary radio frequency domain such as conversion are executed, and each processed signal is output as an output signal to a subsequent circuit.

  The adaptive control switching circuit 3A inputs the M output signals of the RF signal processing circuit 2A to the adaptive control circuit 6A or to the signal quality determination and demodulation circuit 5A under the control of the controller 10A.

  The adaptive control circuit 6A includes variable amplifiers 7-1 to 7-M, phase shifters 8-1 to 8-M, and a synthesizer 11A. The variable amplifier 7-1 and the phase shifter 8-1 include RF signal processing. The amplifier 2-1 controls the amplitude and phase of the output signal, and the variable amplifier 7-2 and the phase shifter 8-2 control the amplitude and phase of the output signal of the RF signal processor 2-2, and so on. The variable amplifier 7-M and the phase shifter 8-M control the amplitude and phase of the output signal of the RF signal processor 2-M, and the signals whose amplitude and phase are controlled are synthesized by the synthesizer 11A. . As a result, the adaptive control circuit 6A changes the amplitude and phase of the M output signals of the RF signal processing circuit 2A so as to form a radiation pattern having a beam in the desired wave direction and a null in the interference wave direction. Then, adaptive control is performed to synthesize, and the synthesized signal is output as an output signal to a subsequent circuit.

  The signal quality determination / demodulation circuit 5A receives the output signal of the adaptive control circuit 6A or the output signal directly sent from the RF signal processing circuit 2A via the adaptive control switching circuit 3A. 5A determines a signal quality such as a desired wave power-to-noise ratio with respect to this signal, demodulates this signal, and outputs a demodulated signal from the output terminal 9.

  The controller 10A controls the adaptive control circuit 6A based on the M output signals of the RF signal processing circuit 2A, and the antenna switching circuit 1A based on these output signals and the signal quality determination and determination result in the demodulation circuit 5A. To control. Further, the controller 10A controls the adaptive control switching circuit 3A to output the M output signals of the RF signal processing circuit 2A to the adaptive control circuit 6A or directly to the signal quality without going through the adaptive control circuit 6A. Whether to output to the determination and demodulation circuit 5A is switched.

  Here, the constituent elements 1A, 2A, 3A, 5A, 6A, 10A, and 11A in FIG. 15 correspond to the constituent elements 1, 2, 3, 5, 6, 10, and 11 in FIG.

  In the portable wireless communication device 100-5 of the present embodiment, a portion including an RF signal processor 2-1, a variable amplifier 7-1, and a phase shifter 8-1, an RF signal processor 2-2, and a variable amplifier 7-. 2 and the phase shifter 8-2, and similarly, the RF signal processor 2-M, the variable amplifier 7-M, and the phase shifter 8-M are used to obtain M receiving circuit portions. Is configured. The controller 10A controls the adaptive control circuit 6A so as to form a radiation pattern having a beam in a desired wave direction and a null in an interference wave direction by adaptively changing the amplitude and phase of the received signal. In order to improve the signal quality of the received signal when the adaptive control circuit 6A is adaptively controlled, each of the N antenna elements 20-1, 20-2, ..., 20-N is included. The antenna switching circuit 1A is controlled so that each antenna element included in any one of the array antennas is adaptively connected to each subsequent receiving circuit portion.

  Referring to FIG. 15, in the present embodiment, in the antenna switching circuit 1 </ b> A, the switch 1-1 switches the antenna element 20-1 to the RF signal processors 2-1, 2-2,. Connect to any one of 1R-1. The switch 1-2 connects the antenna element 20-2 to any one of the RF signal processors 2-1, 2-2,..., 2-M and the load impedance element 1R-2. 1-N connects the antenna element 20-N to any one of the RF signal processors 2-1, 2-2,..., 2-M and the load impedance element 1R-N. As described later, the switches 1-1, 1-2,..., 1-M are interlocked with each other by the control of the controller 10A, and only M of the antenna elements 20-1, 20-2,. Are connected to the RF signal processors 2-1, 2-2,..., 2-M, and the remaining antenna elements are connected to the load impedance elements. Next, the RF signal processors 2-1, 2-2,..., 2 -M execute processing of a necessary radio frequency region on the radio frequency signal input from the antenna switching circuit 1 A to perform an adaptive control switching circuit. Output to 3A. The adaptive control switching circuit 3A includes switches 3-1, 3-2,..., 3-M controlled by the controller 10A. The switch 3-1 outputs the output signal from the RF signal processor 2-1 to the variable amplifier 7. -1 (contact a side) or directly switched to output to the signal quality judgment and demodulation circuit 5A (contact b side), the switch 3-2 outputs from the RF signal processor 2-2 The signal is switched to output the signal to the variable amplifier 7-2 (contact point a side) or directly to the signal quality judgment and demodulation circuit 5A (contact point b side). Switching is executed so that the output signal from the signal processor 2-M is output to the variable amplifier 7-M (contact a side) or directly to the signal quality judgment and demodulation circuit 5A (contact b side). . When the adaptive control circuit 6A controls the amplitude and phase of the received signal, the switches 3-1, 3-2,..., 3-M are respectively switched to the contact a side by the controller 10A, and the RF signal processor 2- The output signals 1, 2-2,..., 2-M are input to the variable amplifiers 7-1, 7-2,. The variable amplifier 7-1 changes the amplitude of the input signal, then the phase shifter 8-1 changes the phase of the signal after amplitude adjustment, and the variable amplifier 7-2 changes the amplitude of the input signal. Then, the phase shifter 8-2 changes the phase of the signal after amplitude adjustment. Similarly, the variable amplifier 7-M changes the amplitude of the input signal, and then the phase shifter 8-M Then, the phase of the signal after amplitude adjustment is changed. The combiner 11A combines the signals after adjusting the amplitude and phase, and outputs the combined signals to the signal quality determination and demodulation circuit 5A. The signal quality determination / demodulation circuit 5A determines signal quality such as CNR with respect to the signal input from the adaptive control circuit 6A or the signal input directly from the RF signal processing circuit 2A via the adaptive control switching circuit 3A. The determination result is output to the controller 10A, and this signal is demodulated using a demodulation method corresponding to the modulation method on the transmission side, and a demodulated signal is output from the output terminal 9. Further, the controller 10A receives inputs from the RF signal processors 2-1, 2-2,..., 2-M when the switches 3-1, 3-2,. The signal strength of each received signal is detected.

  As described above, according to the portable wireless communication device 100-5 according to the present embodiment, the antenna switching circuit 1A includes each antenna element included in any one of a plurality of partial array antennas. Connected to each of the M receiving circuit parts, each receiving circuit part adjusts the amplitude and phase of the radio frequency signal received by the antenna element connected to the receiving circuit part, and outputs the adjusted received signal Then, the signal quality determination / demodulation circuit 5A determines the signal quality of the reception signal based on the reception signal output from each reception circuit portion. The controller 10A has a beam in a desired wave direction by adjusting the amplitude and phase of each radio frequency signal based on the radio frequency signal received by each antenna element connected to each receiving circuit portion, and To adaptively control each receiving circuit portion so as to form a radiation pattern having a null in the interference wave direction, and to improve the signal quality of the received signal when each receiving circuit portion is adaptively controlled, The antenna switching circuit 1A is controlled to adaptively switch a plurality of array antennas. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Sixth embodiment.
FIG. 16 is a plan view showing an open state of the foldable portable radio communication device 100-6 provided with the adaptive antenna device according to the sixth embodiment of the present invention, and FIG. 17 is a foldable portable radio of FIG. It is a side view of the communication apparatus 100-6. 18 is a perspective view showing the left hinge portion 304a and the right hinge portion 304b of the hinge portion 304 of FIGS. 16 and 17, and FIG. 19 is respectively shown in the left hinge portion 304a and the right hinge portion 304b of FIG. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are inserted. This embodiment is an example of the portable wireless communication apparatus 100-5 according to the fifth embodiment shown in FIG. 15, and includes two receiving circuit portions (not shown) and four antenna elements. This corresponds to the configuration.

  16 and 17, the portable wireless communication device 100-6 according to the present embodiment includes a boom portion 310 of the portable wireless communication device 100-2 according to the second embodiment, and an antenna element 311 in the boom portion 310. Instead of the feeder line 322A and the terminal 322 of the wireless communication circuit 319, two antenna elements 902 and 904 projecting outside the portable wireless communication device 100-6 are provided. Each antenna element 312 and 313 is provided with feeding points Q41 and Q42 at its lower end, as in the second embodiment. The antenna element 902 is a cylindrical conductor, and is provided at the upper left end of the lower housing 303 so as to protrude substantially parallel to the longitudinal direction (vertical direction) of the lower housing 303. An antenna cover 902A is provided at the tip (upper end) of the antenna element 902, and the feeding point Q43 at the lower end of the antenna element 902 is connected to the terminal 903 of the wireless communication circuit 319 via the feeding line 903A. The antenna element 902 is electrically connected to the wireless communication circuit 319. Similarly, the antenna element 904 is also a cylindrical conductor, and is provided at the upper right end portion of the lower housing 303 so as to protrude substantially parallel to the longitudinal direction of the lower housing 303. An antenna cover 904A is provided at the tip of the antenna element 904, and the feeding point Q44 at the lower end of the antenna element 904 is connected to the terminal 905 of the wireless communication circuit 319 via the feeding line 905A. Are electrically connected to the wireless communication circuit 319. The antenna elements 902 and 904 may be provided so as to be housed in the lower housing 302. In the embodiment shown in FIG. 16, the antenna elements 312 and 313 built in the upper housing 302 are in the same plane, and the antenna elements 902 and 904 protruding to the outside of the lower housing 303 are in the same plane. It has the structure which exists in.

  The portable wireless communication device 100-6 of the present embodiment includes the antenna elements 312, 313, 902, and 904, so that six sets of partial array antennas each including any two of them are configured. The straight lines A41, A42, A43, A44, A45, A46 connecting the feeding points of the antenna elements included in each of the six sets of array antennas are arranged so as to have different directions. Control is performed so that each of the antenna elements included in any one of these array antennas is adaptively connected to a receiving circuit portion (not shown) preferably provided on the wireless communication circuit 319. Thus, it is possible to form a beam on an incoming wave having an arbitrary azimuth angle and to form a null on an interference wave having an arbitrary azimuth angle. The radio communication circuit 319 adjusts at least one of the amplitude and the phase of each radio frequency signal based on the radio frequency signal received by each antenna element connected to each reception circuit portion, thereby obtaining a desired wave. Adaptive control to form a radiation pattern having a beam in the direction and null in the interference wave direction, and further improving the signal quality of the received signal when each receiving circuit portion is adaptively controlled Further, the present invention is characterized in that a plurality of sets of array antennas are adaptively switched.

  Although the present embodiment has been described as the portable wireless communication device 100-6 including four antenna elements 312, 313, 902, and 904 and two receiving circuit portions, more than four antenna elements and / or You may comprise as a portable radio | wireless communication apparatus provided with more than two receiving circuit parts. For example, when the portable wireless communication device includes four antenna elements 312, 313, 902, and 904 and three receiving circuit portions, each of the four antenna elements 312, 313, 902, and 904 includes three antenna elements. Multiple sets of array antennas are configured. At this time, the straight line connecting the feeding points of any two antenna elements included in any one set of array antennas among these array antennas is any two included in any other set of array antennas. The antenna element has a direction different from the straight line connecting the feeding points of the antenna elements, so that the three antenna elements included in each array antenna have a predetermined directivity characteristic as a whole, and each array antenna has a different directivity characteristic from each other. .

  Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Seventh embodiment.
FIG. 20 is a plan view showing an open state of the foldable portable radio communication apparatus 100-7 including the adaptive antenna device according to the seventh embodiment of the present invention, and FIG. 21 is a foldable portable radio of FIG. It is a side view of the communication apparatus 100-7. 22 is a perspective view showing the left hinge part 304a and the right hinge part 304b of the hinge part 304 in FIGS. 20 and 21, and FIG. 23 is a diagram showing the left hinge part 304a and the right hinge part 304b in FIG. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are inserted.

  20 and 21, the portable wireless communication device 100-7 according to the present embodiment includes a boom portion 310 of the portable wireless communication device 100-2 according to the second embodiment, and an antenna element 311 in the boom portion 310. Instead of the feed line 322A and the terminal 322 of the wireless communication circuit 319, an antenna element 1002 provided to extend in the width direction at the lower end of the lower housing 303 is provided. Each antenna element 312 and 313 is provided with feeding points Q51 and Q52 at the lower end thereof, as in the second embodiment. The antenna element 1002 is formed of a strip conductor having a widened central portion, and is formed to have a substantially crescent shape or a substantially semicircular shape in the present embodiment, but is not limited to this shape. The two end portions of the antenna element 1002 are provided so as to be positioned at the lower left end portion and the lower right end portion of the lower housing 303, and the lower housing 303 projects downward so as to accommodate the antenna element 1002. The antenna housing portion 303A is configured. The antenna element 1002 of this embodiment is characterized in that its two ends are operated as feed points Q53a and Q53b, respectively. The feeding point Q53a at the left end of the antenna element 1002 is connected to the terminal 1003 of the wireless communication circuit 319 via the feeding line 1002a, and the feeding point Q53b at the right end of the antenna element 1002 is connected to the terminal 1003 of the wireless communication circuit 319 via the feeding line 1002b. The terminals 1003 and 1004 are connected to a switch 1005 on the wireless communication circuit 319. The switch 1005 controls one of the terminals 1003 and 1004 as an antenna switching circuit on the wireless communication circuit 319 (see FIG. 2) under the control of a controller (not shown) on the wireless communication circuit 319. 20) (not shown).

  Since the portable wireless communication device 100-7 of this embodiment includes the antenna elements 312, 313, and 1002, any two of them can be used in the same manner as the portable wireless communication device 100-1 of the first embodiment. A plurality of sets of partial array antennas including the antenna elements are configured, and the straight lines connecting the feeding points of the antenna elements included in these array antennas are arranged in different directions. Further, in the portable wireless communication device 100-7 of the present embodiment, the antenna element 1002 includes two feeding points Q53a and Q53b, and the switch 1005 operates any one of the two feeding points Q53a and Q53b. By switching, the current distribution of the antenna element 1002 changes, so that the radiation characteristics change. Therefore, when the antenna element 1002 is excited through the feeding point Q53a, the array antenna including the antenna elements 312 and 1002 is configured on the straight line A53 connecting the feeding points Q51 and Q53a, and the antenna elements 313 and 1002 are connected. Is formed on a straight line A52 connecting the feeding points Q52 and Q53a, and when the antenna element 1002 is excited via the feeding point Q53b, the array antenna including the antenna elements 312 and 1002 is The array antenna including the antenna elements 313 and 1002 is configured on the straight line A54 connecting the feeding points Q52 and Q53b. The portable radio communication apparatus 100-7 of this embodiment further includes an array antenna including antenna elements 312 and 313 (the direction in which the array antenna is arranged is shown as a straight line A51), and any of these array antennas. Each antenna element included in one set is controlled so as to be adaptively connected to a receiver circuit portion preferably provided on the wireless communication circuit 319, thereby forming a beam on an incoming wave of an arbitrary azimuth angle. In addition, a null can be formed in the interference wave having an arbitrary azimuth angle. According to the configuration of the present embodiment, performance equivalent to that of the portable wireless communication device 100-6 according to the sixth embodiment can be achieved.

  Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Eighth embodiment.
FIG. 24 is a perspective view showing an external appearance of the notebook personal computer 110-8 provided with the adaptive antenna device and the wireless communication function according to the eighth embodiment of the present invention, and FIGS. The top view and the side view of the closed state of the notebook type personal computer 110-8 of FIG. 24 are shown, respectively. The notebook personal computer 110-8 of this embodiment incorporates the wireless communication circuit of FIG. 2 (not shown), and antenna elements 1108, 1109, 1110 corresponding to the antenna elements 20a, 20b, 20c of FIG. 2, respectively. It is provided with.

  Referring to FIG. 24, the notebook personal computer 110-8 includes an upper casing 1102 and a lower casing 1103 that are connected to each other by a hinge 1104. The upper housing 1102 includes a display 1105 and an antenna element 1108, and the lower housing 1103 includes a keyboard 1106, a pointing device 1107, and antenna elements 1109 and 1110.

  As shown in FIG. 25, the antenna elements 1108, 1109, and 1110 are close to the hinge portion 1104 at the right ends of the upper housing 1102 and the lower housing 1103 when the notebook personal computer 110-8 is in a closed state. The antenna element 1109, the antenna element 1110, and the antenna element 1108 are provided in this order. Antenna elements 1108, 1109, and 1110 include feed points Q61, Q62, and Q63, respectively, at predetermined positions on the antenna element. Here, as shown in FIG. 26, the antenna element 1108 and the antenna element 1110 are provided so as to have a horizontal distance d1 when the notebook type personal computer 110-8 is in a closed state. The antenna element 1109 and the antenna element 1110 are provided so as to have a horizontal distance d2. The distances d1 and d2 are preferably set to be not less than 0.2λ and not more than 0.5λ, where λ is the wavelength of the radio signal transmitted and received.

  Since the notebook type personal computer 110-8 of the present embodiment includes the antenna elements 1108, 1109, and 1110, the antenna elements 1108 and 1109 are provided in the same manner as the portable wireless communication apparatus 100-1 according to the first embodiment. A partial array antenna consisting of antenna elements 1108 and 1110 and a partial array antenna consisting of antenna elements 1109 and 1110 are formed and included in three sets of array antennas, respectively. Antenna elements 1110 and 1110, that is, a straight line A 61 connecting the feeding points Q 61 and Q 62 of the antenna elements 1108 and 1109, a straight line A 62 connecting the feeding points Q 62 and Q 63 of the antenna elements 1109 and 1110, and the antenna element 1110. , 1108, a straight line A6 connecting the feeding points Q63, Q61 DOO is arranged to have different directions. The notebook personal computer 110-8 is adapted to a receiving circuit portion (not shown) in which preferably two antenna elements included in any one of these array antennas are provided in the wireless communication circuit. By controlling so as to be connected to each other, it is possible to form a beam on an incoming wave having an arbitrary azimuth angle and to form a null on an interference wave having an arbitrary azimuth angle. The wireless communication circuit adjusts at least one of the amplitude and the phase of each radio frequency signal based on the radio frequency signal received by each antenna element connected to each receiving circuit portion, thereby obtaining a desired wave direction. Adaptively controlled to form a radiation pattern having a beam and a null in the interference wave direction, and further improving the signal quality of the received signal when each receiving circuit part is adaptively controlled A plurality of array antennas are adaptively switched. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Ninth embodiment.
FIG. 27 is a perspective view showing an external appearance of a notebook personal computer 110-9 having an adaptive antenna device according to the ninth embodiment of the present invention in an open state, and FIGS. 28 and 29 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-9 are shown. This embodiment is a modification of the notebook personal computer 110-8 according to the eighth embodiment, and instead of the antenna elements 1108, 1109, and 1110 shown in FIGS. And the lower housing 1103 includes antenna elements 1203 and 1204.

  As shown in FIG. 28, the antenna elements 1202, 1203, and 1204 are close to the hinge portion 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-9 is closed. The antenna element 1202, the antenna element 1203, and the antenna element 1204 are provided in this order. Antenna elements 1202, 1203, and 1204 include feed points Q71, Q72, and Q73, respectively, at predetermined positions on the antenna element. Here, as shown in FIG. 29, the antenna element 1202 and the antenna element 1203 are provided so as to have a horizontal distance d1 when the notebook type personal computer 110-9 is in a closed state. The antenna element 1203 and the antenna element 1204 are provided apart from each other so as to have a horizontal distance d2. The distances d1 and d2 are preferably set to 0.2λ or more and 0.5λ or less.

  Since the notebook personal computer 110-9 of this embodiment includes the antenna elements 1202, 1203, and 1204, any two of them can be used in the same manner as the notebook personal computer 110-8 according to the eighth embodiment. Are arranged so that the straight lines A71, A72, A73 connecting the feeding points of the antenna elements included in the three sets of array antennas have different directions from each other. The Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Tenth embodiment.
FIG. 30 is a perspective view showing an external appearance of a notebook personal computer 110-10 equipped with an adaptive antenna device according to the tenth embodiment of the present invention, and FIGS. 31 and 32 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-10 are shown. This embodiment is a modification of the notebook personal computer 110-8 according to the eighth embodiment. Instead of the antenna elements 1108, 1109, and 1110 shown in FIGS. And the lower casing 1103 includes antenna elements 1303 and 1304.

  As shown in FIG. 31, the antenna elements 1302, 1303, and 1304 are close to the hinge portion 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-10 is in a closed state. The antenna element 1303, the antenna element 1302, and the antenna element 1304 are provided in this order. The antenna elements 1302, 1303, and 1304 include feed points Q81, Q82, and Q83, respectively, at predetermined positions on the antenna element. Here, as shown in FIG. 32, the antenna element 1303 and the antenna element 1302 are provided so as to have a horizontal distance d1 when the notebook personal computer 110-10 is in a closed state. Similarly, the antenna element 1304 is provided to have a horizontal distance d2 when the notebook personal computer 110-10 is in a closed state. The distances d1 and d2 are preferably set to 0.2λ or more and 0.5λ or less, respectively.

  Since the notebook personal computer 110-10 of the present embodiment includes the antenna elements 1302, 1303, and 1304, any two of them can be used in the same manner as the notebook personal computer 110-8 according to the eighth embodiment. Are included, and the straight lines A81, A82, A83 connecting the feeding points of the antenna elements included in each of the three sets of array antennas are arranged in different directions. The Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Eleventh embodiment.
FIG. 33 is a perspective view showing an external appearance of the notebook personal computer 110-11 provided with the adaptive antenna device according to the eleventh embodiment of the present invention. FIGS. 34 and 35 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-11 are shown. This embodiment is an example of the portable wireless communication apparatus 100-5 according to the fifth embodiment shown in FIG. 15, and includes two receiving circuit portions (not shown) and four antenna elements 1402 and 1403. , 1404, 1405.

  The laptop personal computer 110-11 of this embodiment includes antenna elements 1402 and 1403 in the upper casing 1102 instead of the antenna elements 1108, 1109 and 1110 in FIGS. 24 to 26, and antenna elements in the lower casing 1103. 1404 and 1405 are configured. As shown in FIG. 34, the antenna elements 1402, 1403, 1404, and 1405 are hinged portions 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-11 is in a closed state. The antenna element 1404, the antenna element 1405, the antenna element 1403, and the antenna element 1402 are provided in this order in the order from the nearest. The antenna elements 1402, 1403, 1404, and 1405 are provided with feed points Q91, Q92, Q93, and Q94, respectively, at predetermined positions on the antenna element. Here, as shown in FIG. 35, the antenna element 1405 and the antenna element 1403 are spaced apart so as to have a horizontal distance d1 when the notebook personal computer 110-11 is in a closed state. The antenna element 1404 and the antenna element 1405 are spaced apart to have a horizontal distance d2, and the antenna element 1403 and the antenna element 1402 are spaced apart to have a horizontal distance d3. The distances d1, d2, and d3 are preferably set to 0.2λ or more and 0.5λ or less.

  Although the present embodiment has been described as a notebook personal computer 110-11 having four antenna elements 1402, 1403, 1404, and 1405 and two receiving circuit portions, more than four antenna elements and / or You may comprise as a notebook-type personal computer provided with more than two receiving circuit parts. For example, when a notebook personal computer includes four antenna elements 1402, 1403, 1404, and 1405 and three receiving circuit portions, each of the four antenna elements 1402, 1403, 1404, and 1405 includes three antenna elements. Multiple sets of array antennas are configured. At this time, a straight line connecting the feeding points of any two antenna elements included in any one set of the three array antennas is any two included in any other one set of array antennas. The antenna element has a direction different from the straight line connecting the feeding points of the two antenna elements, so that the three antenna elements included in each array antenna have a predetermined directivity characteristic as a whole, and each array antenna has a different directivity characteristic. Have.

  The notebook personal computer 110-11 according to the present embodiment includes the antenna elements 1402, 1403, 1404, and 1405, whereby the portable wireless communication device 100-5 according to the fifth embodiment and the eighth embodiment are related. Similarly to the notebook personal computer 110-8, six sets of partial array antennas each including any two of them are configured, and each of the feeding points of the antenna elements included in each of the six sets of array antennas is connected. The straight lines A91, A92, A93, A94, A95, and A96 are arranged so as to have different directions. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Twelfth embodiment.
FIG. 36 is a perspective view showing an external appearance of a notebook personal computer 110-12 provided with an adaptive antenna device according to a twelfth embodiment of the present invention. FIGS. 37 and 38 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-12 are shown. The present embodiment is a modification of the notebook personal computer 110-11 according to the eleventh embodiment, and instead of the antenna elements 1402, 1403, 1404, 1405 of FIGS. Elements 1502 and 1503 are provided, and the lower casing 1103 is provided with antenna elements 1504 and 1505.

  As shown in FIG. 37, the antenna elements 1502, 1503, 1504, and 1505 are provided at the hinge portions 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-12 is in a closed state. The antenna element 1503, the antenna element 1504, the antenna element 1505, and the antenna element 1502 are provided in this order in the order from the nearest. The antenna elements 1502, 1503, 1504, and 1505 include feed points Q101, Q102, Q103, and Q104, respectively, at predetermined positions on the antenna element. Here, as shown in FIG. 38, the antenna element 1503 and the antenna element 1504 are provided separately so as to have a horizontal distance d1 when the notebook personal computer 110-12 is in a closed state. Similarly, the element 1505 and the antenna element 1502 are spaced apart so as to have a horizontal distance d2 when the notebook personal computer 110-12 is in the closed state, and the antenna element 1504 and the antenna element 1505 are also provided. Are spaced apart so as to have a horizontal distance d3. The distances d1, d2, and d3 are preferably set to 0.2λ or more and 0.5λ or less, respectively.

  Since the notebook type personal computer 110-12 of this embodiment includes the antenna elements 1502, 1503, 1504, and 1505, any one of them can be used similarly to the notebook type personal computer 110-11 according to the eleventh embodiment. Six partial array antennas each including two are configured, and straight lines A101, A102, A103, A104, A105, and A106 connecting the feeding points of the antenna elements included in these six sets of array antennas are mutually connected. Arranged to have different directions. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Thirteenth embodiment.
FIG. 39 is a perspective view showing an external appearance of a notebook personal computer 110-13 provided with an adaptive antenna device according to a thirteenth embodiment of the present invention. FIGS. 40 and 41 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-13 are shown. The present embodiment is a modification of the notebook personal computer 110-11 according to the eleventh embodiment, and instead of the antenna elements 1402, 1403, 1404, 1405 of FIGS. Elements 1602 and 1603 are provided, and antenna elements 1604 and 1605 are provided in the lower housing 1103.

  As shown in FIG. 40, the antenna elements 1602, 1603, 1604, and 1605 have a hinge portion 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-13 is in a closed state. The antenna element 1603, the antenna element 1602, the antenna element 1604, and the antenna element 1605 are arranged in this order in the order from Antenna elements 1602, 1603, 1604, and 1605 are provided with feed points Q111, Q112, Q113, and Q114, respectively, at predetermined positions on the antenna element. Here, as shown in FIG. 41, the antenna element 1602 and the antenna element 1604 are provided so as to have a horizontal distance d1 when the notebook type personal computer 110-13 is in a closed state. The antenna element 1603 and the antenna element 1602 are spaced apart to have a horizontal distance d2, and the antenna element 1604 and the antenna element 1605 are spaced apart to have a horizontal distance d3. The distances d1, d2, and d3 are preferably set to 0.2λ or more and 0.5λ or less.

  Since the notebook type personal computer 110-13 of the present embodiment includes the antenna elements 1602, 1603, 1604, and 1605, as with the notebook type personal computer 110-11 according to the eleventh embodiment, any one of them is provided. Six partial array antennas each including two are configured, and straight lines A111, A112, A113, A114, A115, and A116 connecting the feeding points of the antenna elements included in these six sets of array antennas are mutually connected. Arranged to have different directions. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Fourteenth embodiment.
FIG. 42 is a perspective view showing an external appearance of a notebook personal computer 110-14 provided with an adaptive antenna device according to a fourteenth embodiment of the present invention. FIGS. 43 and 44 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-14 are shown. The present embodiment is a modification of the notebook personal computer 110-11 according to the eleventh embodiment, and instead of the antenna elements 1402, 1403, 1404, 1405 of FIGS. Elements 1702 and 1703 are provided, and antenna elements 1704 and 1705 are provided in the lower housing 1103.

  As shown in FIG. 43, the antenna elements 1702, 1703, 1704, and 1705 are provided at the hinge portion 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-14 is in a closed state. The antenna element 1704, the antenna element 1703, the antenna element 1705, and the antenna element 1702 are arranged in this order in the order from. The antenna elements 1702, 1703, 1704, and 1705 are provided with feeding points Q121, Q122, Q123, and Q124 at predetermined positions on the antenna element, respectively. Here, as shown in FIG. 44, the antenna element 1704 and the antenna element 1703 are provided so as to have a horizontal distance d1 when the notebook personal computer 110-14 is in a closed state. The antenna element 1705 is provided so as to have a horizontal distance d2 when the notebook personal computer 110-14 is in a closed state, and the antenna element 1705 and the antenna element 1702 are similarly provided. 14 is provided to have a horizontal distance d3 when in the closed state. The distances d1, d2, and d3 are preferably set to 0.2λ or more and 0.5λ or less, respectively.

  Since the notebook type personal computer 110-14 of this embodiment includes the antenna elements 1702, 1703, 1704, and 1705, as with the notebook type personal computer 110-11 according to the eleventh embodiment, any one of them is provided. Six partial array antennas each including two are configured, and straight lines A121, A122, A123, A124, A125, and A126 connecting the feeding points of the antenna elements included in these six sets of array antennas are mutually connected. Arranged to have different directions. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

Fifteenth embodiment.
FIG. 45 is a perspective view showing an external appearance of a notebook personal computer 110-15 provided with an adaptive antenna device according to a fifteenth embodiment of the present invention, and FIGS. 46 and 47 show the notebook of FIG. A top view and a side view of the closed type personal computer 110-15 are shown. The present embodiment is a modification of the notebook personal computer 110-11 according to the eleventh embodiment, and instead of the antenna elements 1402, 1403, 1404, 1405 of FIGS. Elements 1802 and 1803 are provided, and antenna elements 1804 and 1805 are provided in the lower housing 1103.

  As shown in FIG. 46, the antenna elements 1802, 1803, 1804, and 1805 have a hinge portion 1104 at the right ends of the upper casing 1102 and the lower casing 1103 when the notebook personal computer 110-15 is closed. The antenna element 1803, the antenna element 1804, the antenna element 1802, and the antenna element 1805 are arranged in this order in order from the nearest. Antenna elements 1802, 1803, 1804 and 1805 are provided with feeding points Q131, Q132, Q133 and Q134 at predetermined positions on the antenna element, respectively. Here, as shown in FIG. 47, the antenna element 1803 and the antenna element 1804 are provided so as to have a horizontal distance d1 when the notebook personal computer 110-15 is in a closed state. The antenna element 1802 is provided so as to have a horizontal distance d2 when the notebook personal computer 110-15 is in a closed state, and the antenna element 1802 and the antenna element 1805 are similarly provided. 15 is provided to have a horizontal distance d3 when in the closed state. The distances d1, d2, and d3 are preferably set to 0.2λ or more and 0.5λ or less, respectively.

  Since the notebook type personal computer 110-15 of this embodiment includes the antenna elements 1802, 1803, 1804, and 1805, as with the notebook type personal computer 110-11 according to the eleventh embodiment, any one of them is provided. Six partial array antennas each including two are configured, and straight lines A131, A132, A133, A134, A135, and A136 connecting the feeding points of the antenna elements included in these six sets of array antennas are mutually connected. Arranged to have different directions. Therefore, in the present embodiment, by configuring multiple sets of array antennas in different directions, even if a certain array antenna cannot sufficiently suppress the interference wave at a predetermined arrival angle, it is possible to use another array antenna. The interference wave can be suppressed, and the interference wave can be suppressed by adaptive control for the incoming wave in an arbitrary direction.

  In the eighth to fifteenth embodiments of the present invention, the notebook personal computer in the closed state has been described. However, the adaptive antenna apparatus according to the embodiment of the present invention may be operated in the notebook personal computer in the opened state. .

  The wireless communication device according to the embodiment of the present invention is not limited to a mobile phone or a notebook personal computer having a wireless communication function, and may be any arbitrary computer such as a laptop computer or a handheld device having a wireless communication function. It is applicable to a mobile radio communication device.

  As described above in detail, according to the present invention, the amplitude and phase of the received signal are adaptively changed, and each antenna element included in any one of the plurality of partial array antennas is then changed. An adaptive antenna device capable of forming a beam in an incoming wave of an arbitrary azimuth angle and forming a null in an interference wave of an arbitrary azimuth angle by adaptively connecting to each receiving circuit portion of the stage, and The used wireless communication device can be provided.

  According to each embodiment described in this specification, for example, even when a user's finger touches a specific antenna element, an adaptive operation can be performed using the remaining antenna elements, and deterioration of signal quality is suppressed. be able to. This is particularly effective when, for example, a part of a human body such as a user's finger or head or an obstacle such as a bag is close to the antenna element. In particular, since each radiation characteristic changes with time in the usage situation, it is expected that the C / (N + I) improvement effect by adaptive control also varies. In this case, degradation of signal quality can be suppressed by preparing a plurality of options and selecting the one with the highest signal quality.

It is a perspective view which shows the structure of the portable radio | wireless communication apparatus 100-1 provided with the adaptive antenna apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communication circuit of the portable radio | wireless communication apparatus 100-1 of FIG. It is a top view which shows the open state of the foldable portable radio | wireless communication apparatus 100-2 provided with the adaptive antenna apparatus which concerns on the 2nd Embodiment of this invention. It is a side view of the foldable portable wireless communication apparatus 100-2 of FIG. FIG. 5 is a perspective view showing a left hinge part 304a and a right hinge part 304b in the hinge part 304 of FIGS. 3 and 4. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are inserted in the left hinge part 304a and the right hinge part 304b of FIG. 5, respectively. It is a top view which shows the open state of the foldable portable radio | wireless communication apparatus 100-3 provided with the adaptive antenna apparatus which concerns on the 3rd Embodiment of this invention. It is a side view of the foldable portable radio | wireless communication apparatus 100-3 of FIG. It is a perspective view which shows the left hinge part 304a and the right hinge part 304b among the hinge parts 304A of FIG.7 and FIG.8. FIG. 10 is a perspective view of a hinge portion 304A when a cylindrical connecting member 314 is inserted into the left hinge portion 304a of FIG. It is a top view which shows the open state of the foldable portable radio | wireless communication apparatus 100-4 provided with the adaptive antenna apparatus which concerns on the 4th Embodiment of this invention. It is a side view of the foldable portable radio | wireless communication apparatus 100-4 of FIG. It is a perspective view which shows the left hinge part 304a and the right hinge part 304b among the hinge parts 304 of FIG.11 and FIG.12. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are inserted in the left hinge part 304a and the right hinge part 304b of FIG. 13, respectively. It is a block diagram which shows the structure of the radio | wireless communication circuit of the portable radio | wireless communication apparatus 100-5 which concerns on the 5th Embodiment of this invention. It is a top view which shows the open state of the foldable portable radio | wireless communication apparatus 100-6 provided with the adaptive antenna apparatus which concerns on the 6th Embodiment of this invention. It is a side view of the foldable portable radio | wireless communication apparatus 100-6 of FIG. 18 is a perspective view showing a left hinge part 304a and a right hinge part 304b in the hinge part 304 of FIGS. 16 and 17. FIG. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are inserted in the left hinge part 304a and the right hinge part 304b of FIG. 18, respectively. It is a top view which shows the open state of the foldable portable radio | wireless communication apparatus 100-7 provided with the adaptive antenna apparatus which concerns on the 7th Embodiment of this invention. It is a side view of the foldable portable radio | wireless communication apparatus 100-7 of FIG. It is a perspective view which shows the left side hinge part 304a and the right side hinge part 304b among the hinge parts 304 of FIG.20 and FIG.21. It is a perspective view of the hinge part 304 when the cylindrical connection members 314 and 315 are each inserted in the left hinge part 304a and the right hinge part 304b of FIG. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-8 provided with the adaptive antenna apparatus which concerns on the 8th Embodiment of this invention. FIG. 25 is a top view of the notebook personal computer 110-8 in FIG. 24 in a closed state. FIG. 25 is a side view of the notebook personal computer 110-8 in FIG. 24 in a closed state. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-9 provided with the adaptive antenna apparatus which concerns on the 9th Embodiment of this invention. It is a top view of the closed state of the notebook personal computer 110-9 of FIG. It is a side view of the closed state of the notebook personal computer 110-9 of FIG. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-10 provided with the adaptive antenna apparatus which concerns on the 10th Embodiment of this invention. FIG. 31 is a top view of the notebook personal computer 110-10 in FIG. 30 in a closed state. Fig. 31 is a side view of the notebook personal computer 110-10 in Fig. 30 in a closed state. It is a perspective view which shows the external appearance of the open state of the notebook type personal computer 110-11 provided with the adaptive antenna apparatus which concerns on the 11th Embodiment of this invention. FIG. 34 is a top view of the notebook personal computer 110-11 in FIG. 33 in a closed state. It is a side view of the closed state of the notebook type personal computer 110-11 of FIG. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-12 provided with the adaptive antenna apparatus which concerns on the 12th Embodiment of this invention. FIG. 37 is a top view of the notebook personal computer 110-12 in FIG. 36 in a closed state. It is a side view of the closed state of the notebook type personal computer 110-12 of FIG. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-13 provided with the adaptive antenna apparatus based on the 13th Embodiment of this invention. It is a top view of the closed state of the notebook type personal computer 110-13 of FIG. It is a side view of the closed state of the notebook type personal computer 110-13 of FIG. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-14 provided with the adaptive antenna apparatus based on the 14th Embodiment of this invention. FIG. 43 is a top view of the notebook personal computer 110-14 in FIG. 42 in a closed state. FIG. 43 is a side view of the notebook personal computer 110-14 in FIG. 42 in a closed state. It is a perspective view which shows the external appearance of the open state of notebook type personal computer 110-15 provided with the adaptive antenna apparatus which concerns on 15th Embodiment of this invention. FIG. 46 is a top view of the notebook personal computer 110-15 in FIG. 45 in a closed state. It is a side view of the closed state of the notebook type personal computer 110-15 of FIG. It is a top view which shows the array antenna apparatus provided with the two half-wavelength dipole antennas 31 and 32 when it arrange | positions so that it may mutually become parallel based on a prior art. 48 is a simulation result related to the array antenna apparatus of FIG. 48, and the horizontal plane radiation of the adaptively controlled array antenna apparatus when a desired wave with an azimuth angle of 20 degrees and an interference wave with an azimuth angle of −20 degrees are incident on the array antenna apparatus. It is a figure which shows an example of a pattern. 48 is a simulation result related to the array antenna apparatus of FIG. 48, and the horizontal radiation pattern of the adaptively controlled array antenna apparatus when a desired wave with an azimuth angle of 65 degrees and an interference wave with an azimuth angle of 25 degrees are incident on the array antenna apparatus. It is a figure which shows an example. 48 is a simulation result of the array antenna apparatus of FIG. 48, and a horizontal plane radiation pattern of the adaptively controlled array antenna apparatus when a desired wave with an azimuth angle of 110 degrees and an interference wave with an azimuth angle of 70 degrees are incident on the array antenna apparatus. It is a figure which shows an example. 48 is a simulation result relating to the array antenna apparatus of FIG. 48, and a horizontal plane radiation pattern of the adaptively controlled array antenna apparatus when a desired wave with an azimuth angle of 155 degrees and an interference wave with an azimuth angle of 115 degrees is incident on the array antenna apparatus. It is a figure which shows an example.

Explanation of symbols

1, 1A ... antenna switching circuit,
1a, 1b, 1c, 1-1, 1-2,..., 1-N, 3a, 3b, 3-1, 3-2,.
1Ra, 1Rb, 1Rc, 1R-1, 1R-2, ..., 1R-N ... load impedance elements,
2, 2A ... RF signal processing circuit,
2a, 2b, 2-1, 2-2, ..., 2-M ... RF signal processor,
3, 3A ... Adaptive control switching circuit,
5, 5A ... Signal quality judgment and demodulation circuit,
6, 6A ... Adaptive control circuit,
7a, 7b, 7-1, 7-2,..., 7-M, variable amplifier,
8a, 8b, 8-1, 8-2,..., 8-M, phase shifter,
9: Output terminal,
10, 10A ... controller,
11, 11A ... Synthesizer,
20a, 20b, 20c, 20-1, 20-2, ..., 20-N ... antenna elements,
100-1 thru | or 100-7 ... portable radio | wireless communication apparatus,
101 ... Case,
102 ... display,
103 ... Keyboard,
103a ... key,
103b ... Cross key
104 ... Speaker,
105 ... Microphone,
110-8 to 110-15 ... notebook personal computer,
302 ... upper housing,
302a ... Upper first housing part,
302b ... upper second casing,
303 ... lower housing,
303A ... Antenna housing part,
304 ... Hinge part,
304a ... left hinge part,
304b ... right hinge part,
304aa, 304ba ... cylindrical portion,
304ab, 304bb ... blades,
304abh, 304bbh ... screw holes,
305 ... Central hinge part,
306 ... Liquid crystal display,
307 ... Speaker,
308 ... Microphone,
309 ... rechargeable battery,
310 ... Boom part,
311, 312, 313 ... antenna elements,
314, 315 ... cylindrical connecting member,
316, 317 ... screws,
318 ... printed circuit board,
319: wireless communication circuit,
320, 321, 322 ... terminals,
320A, 321A, 322A ... feed line,
402, 403, 404 ... antenna elements,
502, 503 ... antenna elements,
902, 904 ... antenna element,
902A, 904A ... Antenna cover,
903, 905 ... terminals,
903A, 905A ... feed line,
1002 ... Antenna element,
1002a, 1002b ... feed line,
1003, 1004 ... terminals,
1005 ... switch,
1102 ... upper housing,
1103 ... lower housing,
1104: Hinge part,
1105 ... display,
1106 ... Keyboard,
1107 ... pointing device,
1108, 1109, 1110, 1202, 1203, 1204, 1302, 1303, 1304, 1402, 1403, 1404, 1405, 1502, 1503, 1504, 1505, 1602, 1603, 1604, 1605, 1702, 1703, 1704, 1705 1802, 1803, 1804, 1805 ... antenna elements,
Q1, Q2, Q3, Q11, Q12, Q13, Q21, Q22, Q23, Q31, Q32, Q33, Q41, Q42, Q43, Q44, Q51, Q52, Q53a, Q53b, Q61, Q62, Q63, Q71, Q72, Q73, Q81, Q82, Q83, Q91, Q92, Q93, Q94, Q101, Q102, Q103, Q104, Q111, Q112, Q113, Q114, Q121, Q122, Q123, Q124, Q131, Q132, Q133, Q134 ... feed point .

Claims (6)

A plurality of M receiving circuits that adjust at least one of the amplitude and phase of the radio frequency signal and output the adjusted received signal, respectively;
More N antenna elements than M;
Antenna switching means for connecting M antenna elements of the N antenna elements to the M receiving circuits, respectively;
A synthesizer that synthesizes M received signals respectively output from the receiving circuits;
Demodulation means for demodulating each received signal output from each receiving circuit or the combined received signal;
Signal quality determining means for determining the signal quality of each received signal output from each receiving circuit or the signal quality of the combined received signal;
An adaptive antenna device comprising the antenna switching means and a control means for controlling the receiving circuits.
The N antenna elements constitute a plurality of sets of partial array antennas each including M antenna elements of the N antenna elements, and any two of the two antennas included in an arbitrary set of partial array antennas. The straight line connecting the feeding points of the antenna elements has a different direction from the straight line connecting the feeding points of any two antenna elements included in any other set of partial array antennas,
The control means includes
Controlling the antenna switching means to connect each antenna element included in one set of partial array antennas of the plurality of sets of partial array antennas to each of the receiving circuits,
When the signal quality of the reception signal output from any one of the reception circuits is equal to or higher than a predetermined threshold, the demodulation means demodulates only the reception signal,
When the signal quality of each received signal output from each receiving circuit is less than the threshold value , each radio signal is received based on the radio frequency signal received by each antenna element connected to each receiving circuit. By adjusting at least one of the amplitude and phase of the frequency signal, each receiving circuit is adaptively controlled so as to form a radiation pattern having a beam in the desired wave direction and a null in the interference wave direction. , The demodulating means demodulates the synthesized received signal,
A radio frequency signal received by each antenna element connected to each receiving circuit when the signal quality of the combined received signal is still less than the threshold value even if each receiving circuit is adaptively controlled In place of the antenna element that has received the radio frequency signal having the lowest signal intensity, one of the antenna elements not connected to each of the receiving circuits is connected to the corresponding receiving circuit. An adaptive antenna apparatus characterized by controlling the antenna switching means .   Each of the plurality of sets of partial array antennas is a linear array antenna, and each of the linear array antennas has a straight line connecting the feeding points of the antenna elements included in any one set of linear array antennas. 2. The adaptive antenna device according to claim 1, wherein the adaptive antenna device is arranged so as to intersect with a straight line connecting a feeding point of each antenna element included in the linear array antenna. The adaptive antenna device according to claim 1 or 2 , comprising three antenna elements, two receiving circuits, and three sets of partial array antennas. The adaptive antenna device according to any one of claims 1 to 3 ,
A wireless communication device comprising: a wireless communication circuit that transmits and receives wireless signals by the adaptive antenna device. 5. The wireless communication apparatus according to claim 4, wherein the wireless communication apparatus is a mobile phone. 5. The wireless communication apparatus according to claim 4 , wherein the wireless communication apparatus is a notebook personal computer having a wireless communication function.

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