JP2006108968A - Radio communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve efficiency of transmission by the radio communication apparatus provided with a modulator including a phase control loop for controlling phase of the transmitting output signal and an amplitude control loop for controlling amplitude. <P>SOLUTION: The radio communication apparatus provided with a modulator 109 for controlling phase and amplitude, is constituted to detect the transmitting signal output level of the output of a power amplifying circuit 103 to be fed back to the modulator 109, for control of phase and amplitude with transmitting output signal leakage level 401 generated in the receiving circuit without use of the detecting circuit of a coupler 102. Accordingly, the coupler 102 is eliminated, power loss of the coupler 102 is improved, and the communication period is extended in the case of a mobile phone. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for improving the efficiency of a power amplifier circuit used in a phase control loop for phase and amplitude modulation and a wireless communication apparatus having an amplitude control loop.

  In recent years, EDGE (Enhanced Data Rates), which is an extension of the GSM (Global System for Mobile Communication) method used in Europe, is one of the methods for wireless communication devices (mobile communication devices) such as mobile phones. for GSM Evolution) method has been proposed. This method employs 8-PSK modulation. As a method for realizing this modulation method, a signal to be transmitted is separated into a phase component and an amplitude component, and then feedback is applied to each of the phase control loop and the amplitude control loop to synthesize with an amplifier. There is known a polar loop system configured so as to output the output. (For example, see Patent Document 1)

According to this polar loop system, a transmission output signal and a modulator output that feed back a deterioration in modulation accuracy due to amplitude distortion generated in a power amplifier circuit connected to a modulator output of a wireless communication apparatus from the power amplifier circuit output. It can be improved by comparing and correcting the signal transmitted and output from, and good modulation accuracy can be obtained.
Japanese Patent Laid-Open No. 2004-7443

  However, the wireless communication device described in Patent Document 1 uses a coupler to detect the transmission signal at the output of the power amplifier circuit, and the power loss that occurs when the transmission output signal passes through the coupler is wireless communication. There has been a problem that the efficiency of the transmission circuit of the apparatus is deteriorated and the call time is shortened in the case of a mobile phone.

  The present invention has been made to solve such a conventional problem, and it is possible to detect a transmission output signal level that is fed back in order to control a phase and an amplitude, without using a coupler. It is an object of the present invention to provide a wireless communication apparatus that can reduce the efficiency deterioration of the transmission circuit.

  According to a first aspect of the present invention, there is provided a radio communication apparatus comprising: a phase control loop for controlling a phase of a transmission output signal output from a power amplification circuit; and an amplitude for controlling the amplitude of a transmission output signal output from the power amplification circuit. A modulator having a control loop, and having a configuration in which a reception circuit of the wireless communication apparatus detects a transmission output signal level fed back to the phase control loop and the amplitude control loop in order to control the phase and amplitude ing.

  With this configuration, the transmission output signal level output from the power amplifier circuit, which is fed back to the phase control loop and the amplitude control loop in order to control the phase and amplitude, is detected between the power amplifier circuit and the antenna switch. Since the detection can be performed without using it, the power loss lost in the detection circuit can be improved, and in the case of a mobile phone, the call time can be extended.

  According to a second aspect of the present invention, the wireless communication device has a function of switching a transmission output signal level on a communication system, and the switching is performed when the wireless communication device switches the transmission output signal level. According to a later output level, the transmission output signal detected by the receiving circuit of the wireless communication apparatus and fed back to the phase control loop and the amplitude control loop is held at a constant level.

  With this configuration, even under a communication system such as the GSM system that requires a wide dynamic range with respect to the transmission output level on the communication system, a certain level is achieved for the phase control loop and the amplitude control loop circuit in the wireless communication device. Since the transmission output signal can be fed back, the phase control loop and the amplitude control loop can be stably operated.

  According to a third aspect of the present invention, there is provided a wireless communication device having a configuration in which a reception circuit for detecting a transmission output signal level can be shared among a plurality of frequency bands in a plurality of frequency band compatible wireless communication devices. .

  With this configuration, since the reception circuit necessary for detecting the transmission output signal level can be shared in each frequency band, the circuit scale can be reduced.

  According to a fourth aspect of the present invention, the radio communication apparatus according to the present invention detects the signal at the reception circuit of the radio communication apparatus in accordance with the frequency characteristic of the transmission frequency band of the bandpass filter in the preceding stage of the reception circuit and feeds back to the phase control loop and the amplitude control loop The transmission output signal level to be transmitted is controlled to a constant level within the transmission frequency band transmitted by the wireless communication apparatus.

  With this configuration, even if the frequency characteristics of the transmission frequency band of the bandpass filter occur, the transmission output signal level fed back to the phase control loop and the amplitude control loop can be kept constant, so that the phase control loop and the amplitude control loop Can be operated stably.

  The wireless communication apparatus of the present invention can improve the power loss that is lost in the antenna switch detection circuit, and can extend the call time when the wireless communication apparatus is a mobile phone.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, FIG. 5 shows a schematic block diagram of an embodiment of a polar loop wireless communication apparatus corresponding to the GSM system and the EDGE system.

  In FIG. 5, reference numeral 100 denotes a modulation / demodulation circuit that can perform GMSK modulation in the GSM system, 8-PSK modulation in the EDGE system, and reception in the GSM and EDGE systems. In a communication system that performs a TDMA (Time Domain Multiple access) operation like the GSM system, the antenna switch 101 switches a transmission / reception port in accordance with the timing when the wireless communication apparatus switches to a transmission or reception mode in a time division manner. Switch.

  The coupler 102 detects a transmission output signal having a phase component and an amplitude component output from the power amplifier circuit 103. The power amplifier circuit 103 is a circuit that amplifies a signal output from the modulation circuit of the modem circuit 100. A band-pass filter (hereinafter referred to as BPF) 201 attenuates a signal that becomes an interference wave when receiving a radio wave from an antenna.

  Next, an internal circuit of the modem circuit 100 will be described. The modulator 109 divides the GMSK modulated or 8-PSK modulated transmission I and Q signals output from the baseband unit 300 from the output signal of the voltage control oscillator (hereinafter IF-VCO) 111 for the intermediate frequency band. This circuit mixes the signal divided by 110 and generates a modulated wave.

  The phase detector 107 outputs the GMSK modulation output from the modulator 109 or the 8-PSK modulated signal output from the modulator 109 and separated from the limiter 108 by the power amplifier circuit 103. After detection, only the phase component is separated from the mixer 116 and the radio frequency band voltage controlled oscillator (hereinafter referred to as RF-VCO 117) by the GMSK modulation down-converted to the IF frequency band of the modulator 109 or the limiter 115. Further, this is a circuit that compares the phase of the transmission output signal of 8-PSK modulation and outputs a voltage corresponding to the phase difference between these two signals.

  A voltage-controlled oscillator (hereinafter referred to as TX-VCO) 105 for transmission is a circuit that outputs a desired transmission frequency according to a DC voltage value output from the phase detector 107 and rectified by a low-pass filter (hereinafter referred to as LPF) 106. is there. The error amplifier 113 outputs the amplitude component of the 8-PSK modulation signal output from the modulator 109 detected by the amplitude detector 112 and the output from the power amplifier circuit 103 and detected by the coupler 102 and then from the mixer 116 and the RF-VCO 117. This is a circuit that compares the amplitude component of the transmission output signal down-converted to the IF frequency band of the same frequency as that of the modulator 109 and detected by the phase detector 114.

  The amplitude modulator 104 mixes the amplitude component output from the error amplifier 113 with the transmission signal having the phase component output from the TX-VCO 105, and outputs an 8-PSK modulated transmission signal having the phase component and the amplitude component. It is a circuit to do.

  A low noise amplifier (hereinafter referred to as LNA) 202 amplifies a desired radio wave received by an antenna. The mixers 203 and 204 are circuits that mix the received radio wave and the signal obtained by dividing the output signal of the RF-VCO 117 by the frequency divider 209 and demodulate I and Q. Filters 205 and 206 are reception I and Q baseband filters demodulated by the mixers 203 and 204. Amplifiers 207 and 208 are amplifiers that amplify the demodulated reception I and Q.

  Next, FIG. 1 shows a schematic block diagram of the wireless communication apparatus according to the first embodiment of the present invention.

  As shown in FIG. 1, the wireless communication apparatus according to the first embodiment of the present invention is capable of receiving reference numeral 100 for GMSK modulation in the GSM system, 8-PSK modulation in the EDGE system, and GSM and EDGE systems. It is a modem circuit.

  In a communication system that performs a TDMA (Time Domain Multiple Access) operation such as the GSM system, the antenna switch 101 switches a transmission / reception port according to the timing when the wireless communication apparatus is switched to a transmission or reception mode in a time division manner. Switch.

  The power amplification circuit 103 is a circuit that amplifies a signal output from the modulation circuit of the demodulation circuit 100. The BPF 201 is a band-pass filter that attenuates a signal that becomes an interference wave when receiving radio waves from an antenna.

  Next, an internal circuit of the modem circuit 100 will be described. The modulator 109 mixes the GMSK modulated or 8-PSK modulated transmission I and Q signals output from the baseband unit 300 with the signal obtained by dividing the output signal of the IF-VCO 111 by the frequency divider 110, and generates a modulated wave. This is a circuit to be generated.

  The phase detector 107 detects the GMSK modulation output from the modulator 109 or the 8-PSK modulated signal output from the modulator 109 and separated from the limiter 108 by the receiving circuit via the BPF 201 and is mixed by the mixer 116. And the phase of the transmission output signal leakage level 401 of the GMSK modulation down-converted to the IF frequency band of the same frequency as the modulator 109 by the RF-VCO 117 or the 8-PSK modulation in which only the phase component is separated from the limiter 115 The circuit outputs a voltage corresponding to the phase difference between the two signals.

  The TX-VCO 105 is a circuit that outputs a desired transmission frequency according to the DC voltage value output from the phase detector 107 and rectified by the LPF 106. The error amplifier 113 detects the amplitude component of the 8-PSK modulation signal output from the modulator 109 detected by the amplitude detector 112 and the IF frequency that is detected by the receiving circuit via the BPF 201 and has the same frequency as that of the mixer 116 and the RF-VCO 117. This circuit compares the amplitude component of the transmission output signal leakage level 401 detected by the phase detector 114 after being down-converted into a band.

  The amplitude modulator 104 mixes the amplitude component output from the error amplifier 113 with the transmission signal having the phase component output from the TX-VCO 105, and outputs an 8-PSK modulated transmission signal having the phase component and the amplitude component. It is a circuit to do.

  The LNA 202 amplifies a desired radio wave received by an antenna. The mixers 203 and 204 are circuits that mix the received radio wave and the signal obtained by dividing the output signal of the RF-VCO 117 by the frequency divider 209 and demodulate I and Q. Filters 205 and 206 are reception I and Q baseband filters demodulated by the mixers 203 and 204. Amplifiers 207 and 208 are amplifiers that amplify the demodulated reception I and Q.

  Next, the operation of the wireless communication apparatus according to the present embodiment will be described in detail with reference to FIG.

  As shown in FIG. 1, the polar loop system corresponding to the EDGE system is a signal having a phase and amplitude component output from the modulator 109, and a transmission output having a phase and amplitude component output from the power amplifier 103. The phase detector 107 and the error amplifier 113 compare the phase and amplitude of the signal, and the circuit is configured to correct the amplitude distortion caused by the distortion of the power amplifier circuit 103.

  This makes it possible to operate the power amplifier at an operating point close to a more efficient saturation region by using a feedback circuit configuration while realizing the same modulation accuracy as compared with the orthogonal modulation method corresponding to the EDGE method. In the case of a mobile phone, there is an advantage that the call time can be improved.

  As an operation, the phase and amplitude are modulated by the transmission I and Q signals output from the baseband unit 300, and the transmission signal output from the modulator 109 is separated into a phase component and an amplitude component by the limiter 108 and the amplitude detector 112. The In addition to the above, the transmission output signal output from the power amplifier 103 is not detected by the coupler 102 in FIG. 5 but is input to the reception circuit as the transmission output signal leakage level 401 via the antenna switch 101 and the BPF 201. After being detected, mixed with the RF-VCO frequency by the mixer 116 and down-converted to the same frequency as the output signal of the modulator 109, it is separated into a phase component and an amplitude component by the limiter 115 and the amplitude detector 114.

  Thereafter, the signal output from the modulator 109 and the signal output from the power amplifier 103, which are separated into phase components, are compared by the phase detector 107 and correspond to the phase difference between the signal output from the modulator 109 and the signal output from the power amplifier 103. The voltage is output from the phase detector 107, rectified to a DC voltage by the LPF 106, and then input to the TX-VCO 105.

  The TX-VCO 105 outputs a transmission frequency corresponding to the DC voltage, and the transmission signal is input to the amplitude amplifier 104.

  Aside from the phase component, the signal output from the modulator 109 and the signal output from the power amplifier 103, which are separated into amplitude components, are compared by the error amplifier 113 and correspond to the amplitude difference between this signal and the signal output from the power amplifier 103. The voltage is output from the error amplifier 113 and input to the amplitude modulator 104.

  The amplitude modulator 104 changes the amplitude of the transmission signal input from the TX-VCO 105 in response to the voltage output from the error amplifier.

  Therefore, since the amplitude distortion component generated in the power amplifier 103 is inversely corrected by the error amplifier at the output of the amplitude modulator 104, good modulation accuracy is realized even when the power amplifier is operated at an operating point close to an efficient saturation region. It will be possible.

  As described above, according to the wireless communication apparatus in the present embodiment, it is not necessary to detect the transmission output signal of the power amplifier 103 output for controlling the phase and amplitude using the coupler 102, so that the coupler can be deleted. It becomes.

  Further, since the coupler 102 is not used, the power loss that occurs when the transmission output signal passes through the coupler 102 can be reduced, so that the efficiency of the transmission circuit of the wireless communication apparatus can be improved.

(Second Embodiment)
Next, FIG. 2 shows a schematic block diagram of the wireless communication apparatus according to the second embodiment of the present invention.

  In FIG. 2, the same reference numerals as those in FIG. 1 denote the same components as those shown in FIG. Therefore, the detailed description of these components will be omitted, and only different points will be described.

  In the radio communication apparatus according to the second embodiment of the present invention, as shown in FIG. 2, the transmission output signal leakage level 401 is a power amplification input to the reception circuit via the antenna switch 101 when the radio communication apparatus performs a transmission operation. The transmission output signal level of the circuit 103 output, and the level correction circuit 210 outputs an output level switching signal (output from the baseband 300) by a wireless communication apparatus capable of switching the transmission output signal level on the communication system. When the transmission output signal level output from the power amplifier circuit 103 is switched in (Vapc) 301, the transmission output signal level input to the mixer 116 is varied according to the switched transmission output signal level. The level correction circuit 210 is configured so that the output level can be controlled by the output level switching signal 301.

  Next, the operation of the wireless communication apparatus in this embodiment will be described with reference to FIG.

  As shown in FIG. 2, in a wireless communication device used in a mobile communication system such as a mobile phone, for example, a transmission output signal level output from an antenna of the wireless communication device in accordance with a distance from a base station that performs communication Is switched. The transmission output signal level is switched by switching the transmission output signal level of the power amplifier circuit 103 with an output level switching signal (Vapc) 301 output from the baseband 300. Here, when the transmission output signal level is switched and the transmission output signal level is switched to a low level, the transmission output signal leakage level 401 detected by the receiving circuit to control the phase and amplitude becomes a low level. . Conversely, when the transmission output signal level is switched to a high level, the transmission output signal leakage level 401 detected by the reception circuit to control the phase and amplitude becomes a high level. At this time, the output level switching signal (Vapc) 301 is input to the level correction circuit 210 simultaneously with the power amplifier circuit 103, and the level correction circuit 210 feeds back to the phase control loop and the amplitude control loop in order to control the phase and amplitude. Operates to hold the transmission output signal leakage level 401 input to the mixer 116 at a constant level based on the output level switching signal (Vapc) 301.

  As described above, according to the wireless communication device in the present embodiment, in a mobile communication system such as a mobile phone, a transmission output signal output from the antenna of the wireless communication device in accordance with the distance from the base station that performs communication. Even when the transmission output signal leakage level 401 detected by the receiving circuit changes when the level is switched, the transmission output signal level fed back to the phase control loop and the amplitude control loop is held at a constant level by the level correction circuit 210. Therefore, even under a communication system such as the GSM system that requires a wide dynamic range with respect to the transmission output level on the communication system, a certain level of transmission is performed for the phase control loop and the amplitude control loop circuit in the wireless communication apparatus. The output signal can be fed back, and the phase control loop and amplitude control loop operate stably. It can be.

(Third embodiment)
Next, FIG. 3 shows a schematic block diagram of a wireless communication apparatus according to the third embodiment of the present invention.

  3, the same reference numerals as those in FIGS. 1 and 2 denote the same components as those shown in FIGS. Therefore, the detailed description of these components will be omitted, and only different points will be described.

  In the wireless communication apparatus according to the third embodiment of the present invention, as shown in FIG. 3, the wireless communication apparatus can transmit and receive in a plurality of frequency bands. In FIG. It is configured to be able to. In the example of FIG. 3, three reception circuits and one transmission circuit are configured in order to correspond to three frequency bands. However, a plurality of transmission circuits may be configured as reception circuits. The configuration of each receiving circuit is the same as the configuration of the receiving circuit of one frequency band shown in FIGS. 1 and 2, and therefore, detailed description of these components is also omitted.

  Next, the operation of the wireless communication apparatus in this embodiment will be described with reference to FIG.

  As shown in FIG. 3, in a wireless communication device used in a mobile communication system such as the GSM system, for example, EGSM (Extended Global System for Mobile Communication), DCS (Digital Communication System), A receiving circuit having a different frequency band, such as PCS (Personal Communication Services), is provided in the wireless communication apparatus, and the frequency band to be used is switched in accordance with the area where the wireless communication apparatus is used.

  At this time, detection of the transmission output signal level fed back in order to control the phase and amplitude is performed by the reception circuit. However, in the case of corresponding to three frequency bands as described above, three detection circuits are required. However, when the transmission frequencies of the respective bands are close to each other as in the DCS and PCS bands, the transmission output signal leakage level 403 that is normally detected through the BPF 221 is transmitted through the antenna switch 101 to the BPF 211. Since the transmission output signal leakage level 403a leaking to the side can also be detected, the transmission output signal leakage level 403a can be detected by the level correction circuit 220 connected to the preceding stage of the LNA 212.

  As described above, according to the wireless communication apparatus in the present embodiment, in a mobile communication system such as the GSM system, a receiving circuit that detects a transmission output signal level can be shared among a plurality of bands. Can be reduced, and the circuit can be simplified.

(Fourth embodiment)
Next, FIG. 4 shows a schematic block diagram of a wireless communication apparatus according to the fourth embodiment of the present invention.

  4, the same reference numerals as those shown in FIGS. 1, 2, and 3 denote the same parts as those shown in FIGS. Therefore, the detailed description of these components will be omitted, and only different points will be described.

  In the wireless communication apparatus according to the fourth embodiment of the present invention, as shown in FIG. 4, level detection circuits 230 and 231 detect transmission output signal leakage levels 401, 402, and 403a after passing through BPFs 201 and 211, respectively. It is. The transmission signal detection levels 404 and 405 are report values of the transmission output signal leakage level in each frequency band detected by the level detection circuits 230 and 231 for the baseband 300. The frequency characteristic correction signals 302 and 303 are signals for correcting the frequency characteristic of the transmission output signal leakage level 401 or 402 or 403a within the frequency band calculated in the baseband 300 based on the transmission signal detection levels 404 and 405. The frequency characteristic correction circuits 232 and 233 are circuits for correcting the frequency characteristic of the transmission output signal leakage level generated in each frequency band by the frequency characteristic correction signals 302 and 303.

  Next, the operation of the wireless communication apparatus in this embodiment will be described with reference to FIG.

  As shown in FIG. 4, when the radio communication apparatus according to the present embodiment is performing a communication operation in a mobile communication system such as the GSM system, a transmission output leakage level 401 or a transmission output level 401 at the time of transmission operation in the reception circuit or 402 or 403a is detected, and the transmission output signal is fed back to the phase control loop and the amplitude control loop. At this time, the transmission output leakage level 401, 402, or 403a is input to the receiving circuit via the BPF 201 or 211 connected to the preceding stage of the receiving circuit. At this time, the frequency characteristics of the transmission output leakage level of the transmission frequency band within each frequency band generated by the BPF 201 or 211 are detected by the level detection circuits 230 and 231, and the detection results are transmitted at the transmission signal detection levels 404 and 405. Report to the baseband unit 300. The baseband 300 calculates the frequency characteristics of the transmission output leakage level 401, 402, or 403a in the transmission frequency band based on the transmission signal detection levels 404 and 405, and the calculation result when the transmission frequency is switched in the frequency band. Are output to the frequency characteristic correction circuits 232 and 233 using the frequency characteristic correction signals 302 and 303. The frequency characteristic correction circuits 232 and 233 are frequency levels within the transmission frequency band of the transmission output leakage level 401, 402, or 403a input to the level correction circuits 210 and 220 based on the frequency characteristic correction signals 302 and 303. In order to correct the characteristics and control the phase and amplitude, feedback is performed to the phase control loop and the amplitude control loop, that is, the transmission output signal leakage level input to the mixer 116 is maintained at a constant level.

  As described above, according to the wireless communication apparatus in the present embodiment, even if the transmission output signal leakage level 401, 402, or 403a detected by the receiving circuit changes due to the frequency characteristics of the transmission frequency band of the BPF 201 or 211, the phase control is performed. Since the transmission output signal level fed back to the loop and the amplitude control loop is maintained at a constant level, the phase control loop and the amplitude control loop can be stably operated.

  In this embodiment, when the wireless communication apparatus is operating on the communication system, the transmission output leakage level is detected in real time, and the frequency characteristic of the transmission output leakage level in the transmission frequency band within the frequency band is calculated. The transmission output signal level fed back to the phase control loop and the amplitude control loop within the frequency band is corrected to be constant, but the correction of the frequency characteristic of the transmission output leakage level is, for example, pre-adjustment at the time of factory shipment The frequency characteristic correction signals 302 and 303 calculated by the pre-adjustment may be read when the transmission value is calculated and stored in the memory and the transmission frequency is switched by operating on the communication system. For example, it is possible to reduce the baseband processing load when calculating the correction value in real time.

  The wireless communication apparatus of the present invention has an effect of improving the power loss that is lost in the antenna switch detection circuit, and is useful for mobile phones and the like.

1 is a schematic block diagram of a wireless communication apparatus according to a first embodiment of the present invention. Schematic block diagram of a radio communication device according to a second embodiment of the present invention Schematic block diagram of a wireless communication apparatus according to a third embodiment of the present invention Schematic block diagram of a radio communication apparatus according to a fourth embodiment of the present invention Schematic block diagram of a conventional wireless communication device

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Modulation / demodulation circuit 101 Antenna switch 102 Coupler 103 Power amplification circuit 104 Amplitude modulator 105 Voltage control oscillator for transmission 106 Low pass filter 107 Phase detector 108, 115 Limiter 109 Modulator 110 Divider 111 Voltage control oscillator for intermediate frequency band 112, 114 Amplitude detector 113 Error amplifier 116 Mixer 117 Voltage controlled oscillator for radio frequency band 201, 211, 221 Bandpass filter 202, 212, 222 Low noise amplifier 203, 204, 213, 214, 223, 224 Mixer 205, 206 215, 216, 225, 226 Filter 207, 208, 217, 218, 227, 228 Amplifier 209, 219, 229 Frequency divider 210, 220 Level correction circuit 230, 231 level Detection circuit 232 and 233 frequency characteristic correction circuit 300 baseband unit

Claims (4)

  A modulator comprising: a phase control loop that controls the phase of a transmission output signal output from a power amplifier circuit; and an amplitude control loop that controls the amplitude of a transmission output signal output from the power amplifier circuit. A radio communication apparatus characterized in that detection of a transmission output signal level fed back to the phase control loop and the amplitude control loop is performed by a receiving circuit of the radio communication apparatus in order to control the signal.   The wireless communication device has a function of switching a transmission output signal level on a communication system, and when the wireless communication device switches the transmission output signal level, according to the output level after the switching, the wireless communication device 2. The radio communication apparatus according to claim 1, wherein a level of a transmission output signal detected by a receiving circuit and fed back to the phase control loop and the amplitude control loop is held at a constant level.   3. The wireless communication apparatus according to claim 1, wherein a reception circuit that detects the transmission output signal level can be shared among the plurality of frequency bands in the plurality of frequency band-compatible wireless communication apparatuses.   In the wireless communication device, a transmission output signal that is detected by the reception circuit of the wireless communication device and fed back to the phase control loop and the amplitude control loop in accordance with the frequency characteristics of the transmission frequency band of the bandpass filter in the preceding stage of the reception circuit The radio communication apparatus according to any one of claims 1 to 3, wherein the radio communication apparatus is configured to control the level to a constant level within a transmission frequency band transmitted by the radio communication apparatus.

Images