CN109348734B - Antenna device and mobile terminal - Google Patents
Antenna device and mobile terminal Download PDFInfo
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- CN109348734B CN109348734B CN201680042664.1A CN201680042664A CN109348734B CN 109348734 B CN109348734 B CN 109348734B CN 201680042664 A CN201680042664 A CN 201680042664A CN 109348734 B CN109348734 B CN 109348734B
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- H01—ELECTRIC ELEMENTS
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Abstract
An antenna device, comprising: one end of the band elimination filter (105) is electrically connected with the feed branch (103), and the other end is electrically connected with the grounding branch (104); the first antenna branch (101) and the feed branch (103) form a first sub-antenna for generating an electric signal of a first resonant frequency; the second antenna branch (102), the feed branch (103) and the ground branch (104) form a loop antenna for generating an electric signal of a third resonant frequency, and the electric length of the loop antenna is 1/4 of the wavelength of the electric signal of the third resonant frequency; the band-stop filter (105) may filter electrical signals within a predetermined band-stop resonant frequency range. A mobile terminal is also provided. Under the condition that a switch device is not used, the working frequency band of the antenna can be expanded to a wider range, electric signals of different frequency bands are separated by adding the grounding branch (104), so that the cost of the UE is reduced, and meanwhile, the parasitic effect caused by the switch device can be avoided, and the performance of the antenna is improved.
Description
The present application claims priority from the chinese patent application entitled "an antenna" filed by the chinese patent office at 10/12/2016, application number 201610891457.5, the entire contents of which are incorporated herein by reference.
Technical Field
The present invention relates to the field of mobile communications, and in particular, to an antenna device and a mobile terminal.
Background
In order to enhance the quality of the User Equipment (UE), it is becoming more and more common to apply metal to the appearance of the UE, and such design has a great influence on the antenna performance. Wireless communication is a necessary function of the UE, the antenna is a necessary component, and the performance level of the antenna also relates to the quality of the call.
Because the frequency bands used by the UE are more in the global market range, in order to realize full-band coverage, a switching device is added to switch the frequency band of the antenna, so that the UE can transmit and receive signals on each frequency band.
Then, although the full-band coverage of the antenna can be achieved by adding a switching device, the cost for manufacturing the UE is increased by deploying such a switching device in the UE, and at the same time, the structure and performance of the switching device, which is an element constituting an integrated circuit inside the UE, directly determine the performance of the integrated circuit, i.e., the parasitic effect caused by the switching device, which may result in the performance reduction of the antenna.
Disclosure of Invention
The embodiment of the invention provides an antenna device and a mobile terminal, which can expand the working frequency band of an antenna to a wider range under the condition of not using a switch device, and separate electric signals of different frequency bands by adding a grounding branch so as to reduce the cost of UE (user equipment).
A first aspect of an embodiment of the present invention provides an antenna apparatus, including: the antenna comprises a first antenna branch, a second antenna branch, a feed branch, a grounding branch and a band elimination filter;
the band-stop filter is provided with an input end and an output end, the input end is electrically connected with the feed branch section, the output end is electrically connected with the grounding branch section, namely after an electric signal is input from the band-stop filter, the electric signal meeting certain requirements can be output through the filtering of the band-stop filter on the electric signal, and the electric signal which does not meet the requirements cannot pass through the band-stop filter;
the first antenna branch and the feed branch form a first sub-antenna which can transmit and receive a first resonance frequency electric signal, and the first resonance frequency electric signal is a low-frequency electric signal;
the second antenna branch and the feed branch form a second sub-antenna which can transmit and receive a second resonance frequency electric signal, and the second resonance frequency electric signal is a high-frequency electric signal;
the second antenna branch, the feed branch and the ground branch jointly form a loop antenna, the loop antenna can send and receive an electric signal with a third resonant frequency, and the electrical length of the loop antenna is 1/4 of the wavelength corresponding to the electric signal with the third resonant frequency;
for the band-stop filter, the filter is used to filter the electric signal within the preset stop band resonant frequency range, and then the loop antenna can transmit the electric signal of the third resonant frequency.
In the technical solution provided by the embodiment of the present invention, an antenna apparatus is provided, the antenna apparatus includes a first antenna stub, a second antenna stub, a feed stub, a ground stub, and a band elimination filter, one end of the band-stop filter is electrically connected with the second antenna branch, the other end of the band-stop filter is electrically connected with the grounding branch, the first antenna branch and the feeding branch form a first sub-antenna for generating a first resonant frequency electric signal, the second antenna branch and the feeding branch form a second sub-antenna for generating a second resonant frequency electric signal, the second antenna branch, the feeding branch and the grounding branch form a loop antenna for generating a third resonant frequency electric signal, the electrical length of the loop antenna is 1/4 of the corresponding wavelength of the third resonant frequency electric signal, and the band-stop filter is used for filtering electric signals in a preset stopband resonant frequency range. By adopting the antenna device, the working frequency band of the antenna can be expanded to a wider range under the condition of not using a switch device, and the electric signals of different frequency bands are separated by adding the grounding branch knot, so that the cost of the UE is reduced, meanwhile, the parasitic effect brought by the switch device can be avoided, and the performance of the antenna is improved.
With reference to the first aspect of the embodiments of the present invention, in a first implementation manner of the first aspect of the embodiments of the present invention,
the antenna may also be specifically applied to a left-handed antenna mode, wherein one port of the first antenna stub is electrically connected to the ground point, and the other port of the first antenna stub is electrically connected to one port of the feed stub, and the first antenna stub may receive and transmit the first resonant frequency electrical signal. Accordingly, one port of the feed stub is already electrically connected to one port of the first antenna stub, and the other port of the feed stub is electrically connected to the feed point, which is also used for receiving and transmitting the first resonant frequency electrical signal.
In the technical solution provided in the embodiment of the present invention, an antenna device applied to a left-hand antenna mode is provided, in which one end of a first antenna branch is connected to a ground point, the other end of the first antenna branch is connected to one end of a feed branch, similarly, a section of the feed branch is already connected to the first antenna branch, and the other end of the feed branch is connected to a feed point, and a first sub-antenna composed of the first antenna branch and the feed branch can transmit a first resonant frequency electrical signal, so as to improve the practicability of the antenna device.
With reference to the first possible implementation manner of the first aspect of the embodiment of the present invention, in the second implementation manner of the first aspect of the embodiment of the present invention,
the antenna is particularly applicable to a left-handed antenna mode, wherein one port of the second antenna stub is electrically connected to one port of the feed stub, and is capable of receiving and transmitting a second resonant frequency electrical signal, and accordingly, one port of the feed stub is electrically connected to one port of the second antenna stub, and the other port of the feed stub is electrically connected to the feed point, and is also capable of receiving and transmitting the second resonant frequency electrical signal.
Furthermore, in the technical solution provided in the embodiment of the present invention, one end of the second antenna branch in the antenna apparatus is connected to one end of the feed branch, one end of the feed branch is connected to one end of the second antenna branch, and the other end is connected to the feed point, and a second resonant frequency electrical signal can be transmitted through the second antenna branch and the feed branch.
With reference to the first aspect of the embodiments, in a third implementation form of the first aspect of the embodiments of the present invention,
it can also be applied to T-type antenna mode, where one port of the first antenna branch is electrically connected to one port of the feed branch, and can receive and transmit the first resonant frequency electrical signal, and accordingly, one port of the feed branch is already electrically connected to one port of the first antenna branch, and the other port of the feed branch is electrically connected to the feed point, and is also used for receiving and transmitting the first resonant frequency electrical signal.
In the technical solution provided in the embodiment of the present invention, an antenna device applied to a T-type antenna mode is provided, wherein one end of a first antenna branch is electrically connected to one end of a feed branch, one end of the feed branch is already electrically connected to one port of the first antenna branch, and the other end of the feed branch is electrically connected to a feed point, and the first antenna branch and the feed branch receive and transmit an electrical signal of a first resonant frequency, so as to improve the practicability of the antenna device.
With reference to the third possible implementation manner of the first aspect of the embodiment of the present invention, in a fourth implementation manner of the first aspect of the embodiment of the present invention, the antenna apparatus further includes a third antenna stub;
in the T-shaped antenna mode, the first antenna branch and the third antenna branch form a third sub-antenna, the third sub-antenna can transmit and receive a fourth resonance frequency electrical signal, and the fourth resonance frequency electrical signal is specifically an intermediate frequency electrical signal in the long branch 3/4 mode;
the first antenna branch is electrically connected with the third antenna branch, and can receive and transmit a fourth resonant frequency electric signal, one port of the third antenna branch is electrically connected with the first antenna branch, and the other port of the third antenna branch is electrically connected with the grounding point, and can also be used for receiving and transmitting the fourth resonant frequency electric signal.
In the technical solution provided in the embodiment of the present invention, an antenna device applied to a T-shaped antenna mode is provided, where the first antenna branch and the third antenna branch form a third sub-antenna for generating an electrical signal of a fourth resonant frequency, and the third sub-antenna can be used to receive and transmit the electrical signal of the fourth resonant frequency, so as to improve the practicability of the antenna device.
With reference to the fourth possible implementation manner of the first aspect of the embodiment of the present invention, in a fifth implementation manner of the first aspect of the embodiment of the present invention,
in the T-antenna mode, a port of the second antenna stub is electrically connected to a port of the feed stub for receiving and transmitting the second resonant frequency electrical signal, a port of the feed stub is electrically connected to a port of the second antenna stub, and another port of the feed stub is electrically connected to the feed point for receiving and transmitting the second resonant frequency electrical signal.
Furthermore, in the embodiment of the present invention, one end of the second antenna branch in the antenna device is electrically connected to one end of the feed branch, one end of the feed branch is already connected to one end of the second antenna branch, and the other end of the feed branch is electrically connected to the feed point, and the sub-antenna formed by the second antenna branch and the feed branch can receive and transmit the second resonant frequency electrical signal. The antenna device can realize the separation of electric signals with different frequencies, independently optimize the electric signals with different frequencies, and therefore the flexibility of the scheme is increased.
With reference to the first aspect of the embodiment of the present invention, and any one possible implementation manner of the first to fifth aspects of the first aspect, in a sixth implementation manner of the first aspect of the embodiment of the present invention, the antenna apparatus may further include a branch adjusting module;
the branch adjusting module is specifically configured to adjust an electrical length of the loop antenna, that is, the branch adjusting module may adjust the length of the branch to increase or decrease the distributed electrical length.
Furthermore, in the embodiment of the present invention, the electrical length of the loop antenna may be adjusted by the stub adjustment module, so as to embody the flexibility and the practicability of the antenna apparatus.
With reference to the first aspect of the embodiment of the present invention, and any one of the first to fifth possible implementation manners of the first aspect, in a seventh implementation manner of the first aspect of the embodiment of the present invention,
an inductance device can be connected in series on the grounding branch, the electrical length of the grounding branch is changed by connecting the inductance in series, and the effect is equivalent to the length of the added branch. After the inductance module is connected with the grounding branch in series, the inductance module can be used for adjusting the electrical length of the loop antenna by adjusting the inductance strength, and the inductance strength and the electrical length of the loop antenna are in a direct proportion relation.
Furthermore, in the embodiments of the present invention, a method for adjusting the electrical length of the loop antenna by adjusting the strength of the inductance is provided, which has a similar effect to that of directly adjusting the electrical length of the loop antenna, thereby improving the flexibility and feasibility of the scheme.
With reference to the first aspect of the embodiment of the present invention, and any one possible implementation manner of the first to fifth aspects of the first aspect, in an eighth implementation manner of the first aspect of the embodiment of the present invention, the band-stop filter is specifically a low-frequency band-stop filter;
the low-frequency band-stop filter comprises a capacitor device and an inductor device, the capacitor device and the inductor device are connected in a parallel mode, and the low-frequency band-stop filter can mainly obtain an electric signal within a preset stopband resonant frequency range by adjusting the capacitor device and the inductor device.
Furthermore, the specific type of the band-stop filter provided in the embodiment of the present invention may be implemented by filtering with a low-frequency band-stop filter to obtain an electrical signal within a preset stopband resonant frequency range, so that an electrical signal with a third resonant frequency of a newly added intermediate frequency can be obtained without using a switching device, full-high frequency coverage is implemented, the problem of stray radiation rectification possibly caused by the switching device is reduced, the design risk of the antenna apparatus is also reduced, and meanwhile, the band-stop filter is designed to reduce the influence of a large inductor loaded at a feed point on a low frequency.
A second aspect of an embodiment of the present invention provides a mobile terminal, including: a housing and an antenna device;
the shell is mainly used for placing the antenna device;
the antenna device is the antenna device described in the first aspect and any one of the first to eighth embodiments of the first aspect.
In the technical solution provided in the embodiment of the present invention, an antenna apparatus is provided, where the antenna apparatus includes a first antenna branch, a second antenna branch, a feed branch, a ground branch, and a band elimination filter, where one end of the band elimination filter is electrically connected to the second antenna branch, the other end of the band elimination filter is electrically connected to the ground branch, the first antenna branch and the feed branch form a first sub-antenna for generating an electrical signal of a first resonant frequency, the second antenna branch and the feed branch form a second sub-antenna for generating an electrical signal of a second resonant frequency, the second antenna branch, the feed branch and the ground branch form a loop antenna for generating an electrical signal of a third resonant frequency, an electrical length of the loop antenna is 1/4 of a wavelength corresponding to the electrical signal of the third resonant frequency, and the band elimination filter is configured to filter electrical signals within a preset stopband resonant frequency range, and obtaining a third resonance frequency electric signal in the target frequency band. By adopting the antenna device, the working frequency band of the antenna can be expanded to a wider range under the condition of not using a switch device, and the electric signals of different frequency bands are separated by adding the grounding branch knot, so that the cost of the UE is reduced, meanwhile, the parasitic effect brought by the switch device can be avoided, and the performance of the antenna is improved.
Drawings
Fig. 1 is a schematic diagram illustrating an energy conversion principle of an antenna device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an antenna device according to an embodiment of the present invention;
fig. 3 is a schematic view of an antenna device for use in a left-handed arrangement;
fig. 4 is a schematic view of a current model of an antenna device applied in a left-handed scenario;
FIG. 5 is a schematic diagram showing a standing wave comparison between the antenna device in the conventional left-hand scheme and the antenna device in the scheme of the present invention;
fig. 6 is a schematic diagram of a resonant frequency of the antenna device after the intermediate frequency mode is added in the embodiment of the present invention;
fig. 7 is a schematic view of an antenna device used in a T-shaped scheme;
FIG. 8 is a schematic view of a current model of an antenna device applied to a T-shaped scheme;
FIG. 9 is a schematic diagram illustrating simulation comparison of the gain effect after adding a short branch at the feeding point in the embodiment of the present invention;
fig. 10 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an antenna device and a mobile terminal, which can expand the working frequency band of an antenna to a wider range under the condition of not using a switch device, and separate electric signals of different frequency bands by adding a grounding branch so as to reduce the cost of UE (user equipment).
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that the antenna device provided by the present invention is mainly applied to mobile communication systems, such as: global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, abbreviated in english) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), or a Worldwide Interoperability for Microwave Access (WiMAX), and so on.
It should be understood that, in the embodiment of the present invention, the Mobile Terminal includes, but is not limited to, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a Mobile phone (handset) and a portable device (RAN), and the User Equipment may communicate with one or more core networks through a Radio Access Network (Radio Access Network), for example, the UE may be a Mobile phone (or a cellular phone), a computer with a wireless communication function, and the User Equipment may also be a portable, pocket, hand-held, computer-built-in or vehicle-mounted Mobile device.
The antenna device provided by the present invention is typically built in a mobile terminal, wherein the device for transmitting and receiving radio waves in the mobile terminal is called an antenna, i.e. an antenna device. The antenna arrangement provides the required coupling between the transmitter or receiver and the medium through which the radio waves propagate. The antenna device is also an important component of the mobile terminal, as well as the transmitter and the receiver. In which the antenna means radiate radio waves and the reception is also radio waves, whereas the transmitter is not fed to the antenna via the feeder, nor is the reception antenna able to feed radio waves directly to the receiver via the feeder, wherein an energy conversion process has to be performed. In the following, we take the radio communication device as an example to analyze the transmission process of the electrical signal, and further illustrate the energy conversion function of the antenna.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an energy conversion principle of an antenna apparatus according to an embodiment of the present invention, in a transmitting end, a modulated high-frequency oscillation current generated by a transmitter is input to a transmitting antenna through a feeding device (the feeding device may directly transmit a current wave or an electromagnetic wave depending on frequency and form), the transmitting antenna converts the high-frequency oscillation current or the guided wave into a radio wave to radiate to a surrounding space, and in a receiving end, the radio wave is converted into a high-frequency oscillation current or a guided wave through a receiving antenna and transmitted to a receiver through the feeding device. As can be seen from the above process, the antenna device is not only a device for radiating and receiving radio waves, but also an energy converter, which is an interface device between a circuit and a space.
Fig. 2 is a schematic structural diagram of the antenna device in the embodiment of the present invention, and it should be noted that fig. 2 is a schematic diagram for more clearly illustrating a connection relationship and a corresponding position of each antenna branch in the antenna device in the embodiment of the present invention, and is only one schematic diagram of the structure of the antenna device in the embodiment of the present invention, and the antenna device in the embodiment of the present invention may have other structures, and is not limited to the structure shown in fig. 2. Other structures of the antenna according to the embodiment of the present invention will be described in the following embodiments.
Referring to fig. 1, an embodiment of an antenna apparatus according to an embodiment of the present invention includes: a first antenna stub 101, a second antenna stub 102, a feed stub 103, a ground stub 104, and a band rejection filter 105;
one end of the band-elimination filter 105 is electrically connected with the feed branch 103, and the other end of the band-elimination filter 105 is electrically connected with the grounding branch 104;
the first antenna branch 101 and the feed branch 103 form a first sub-antenna for generating an electric signal of a first resonant frequency;
the second antenna branch 102 and the feed branch 103 form a second sub-antenna for generating an electric signal of a second resonant frequency;
the second antenna branch 102, the feed branch 103 and the ground branch 104 form a loop antenna for generating an electric signal of a third resonant frequency, and the electrical length of the loop antenna is 1/4 of the wavelength corresponding to the electric signal of the third resonant frequency;
the band-stop filter 105 is used to filter electrical signals within a predetermined band-stop resonant frequency range.
In this embodiment, the first antenna branch 101 and the feeding branch 103 form a first sub-antenna for transmitting and receiving an electrical signal with a fixed frequency, i.e. a first resonant frequency electrical signal, and similarly, the second antenna branch 102 and the feeding branch 103 form a second sub-antenna for transmitting and receiving an electrical signal with a fixed frequency, i.e. a second resonant frequency electrical signal, wherein the resonant frequency of the second resonant frequency electrical signal is greater than the resonant frequency of the first resonant frequency electrical signal.
The second antenna branch 102, the feed branch 103 and the ground branch 104 form a loop antenna, and the loop antenna is mainly used for transmitting and receiving another electric signal with a fixed frequency, that is, an electric signal with a third resonant frequency, wherein the resonant frequency of the electric signal with the third resonant frequency is greater than the resonant frequency of the electric signal with the first resonant frequency, and the resonant frequency of the electric signal with the third resonant frequency is less than the resonant frequency of the electric signal with the second resonant frequency.
In addition, the electrical length of the loop antenna is 1/4 of the wavelength corresponding to the electrical signal of the third resonant frequency, that is, the new 1/4 mode of the antenna device can be excited by controlling the electrical length of the ground branch 104. The voltage at 1/2 of a complete wave band corresponding to the electric signal is 0, and wave crests are at 1/4 and 3/4, so that the length of 1/4 wavelengths in the electric signal is taken as the electric length of the antenna, the maximum peak value can be obtained, radiation is facilitated, and the extension of a high frequency band can be realized.
The electrical length of the loop antenna can also be calculated using the following formula:
wherein the content of the first and second substances,
denotes the electrical length of the loop antenna, l denotes the physical length of the loop antenna, λ denotes the wavelength of the transmitted electrical signal,
is 1/4 for the wavelength of the electrical signal at the third resonant frequency.
The band-stop filter 105 is further arranged in the loop antenna, and the band-stop filter 105 mainly has the function of filtering electric signals within a preset stopband resonant frequency range, so that the loop circuit can receive and transmit third resonant frequency electric signals within a target frequency band, because the electric signals transmitted through the feed branches 103 may contain electric signals of different frequency bands, the band-stop filter 105 needs to be arranged, the band-stop filter 105 can pass through most frequency components, the upper limit frequency and the lower limit frequency of the preset stopband resonant frequency range are arranged in the band-stop filter 105, that is, the electric signals greater than the upper limit frequency or less than the lower limit frequency cannot pass through the band-stop filter 105, so that the electric signals within the preset stopband resonant frequency range are obtained, and the frequency of the electric signals enables the loop antenna to receive and transmit the third resonant frequency electric signals.
In the technical solution provided by the embodiment of the present invention, an antenna apparatus is provided, the antenna apparatus includes a first antenna stub, a second antenna stub, a feed stub, a ground stub, and a band elimination filter, one end of the band-stop filter is electrically connected with the second antenna branch, the other end of the band-stop filter is electrically connected with the grounding branch, the first antenna branch and the feeding branch form a first sub-antenna for generating a first resonant frequency electric signal, the second antenna branch and the feeding branch form a second sub-antenna for generating a second resonant frequency electric signal, the second antenna branch, the feeding branch and the grounding branch form a loop antenna for generating a third resonant frequency electric signal, the electrical length of the loop antenna is 1/4 of the corresponding wavelength of the third resonant frequency electric signal, and the band-stop filter is used for filtering electric signals in a preset stopband resonant frequency range. By adopting the antenna device, the working frequency band of the antenna can be expanded to a wider range under the condition of not using a switch device, and the electric signals of different frequency bands are separated by adding the grounding branch knot, so that the cost of the UE is reduced, meanwhile, the parasitic effect brought by the switch device can be avoided, and the performance of the antenna is improved.
Next, the antenna device provided by the present invention will be introduced in a left-handed antenna mode and a T-shaped antenna mode, optionally, on the basis of the antenna device corresponding to fig. 2, please refer to fig. 3, fig. 3 is a schematic structural diagram of the antenna device applied in the left-handed solution, and as shown in the figure, the antenna device may further include:
one port of the first antenna stub 101 is electrically connected to the ground point 108, and the other port of the first antenna stub 101 is electrically connected to one port of the feeding stub 103, and is configured to receive and transmit a first resonant frequency electrical signal;
one port of the feeding branch 103 is electrically connected to one port of the first antenna branch 101, and the other port of the feeding branch 103 is electrically connected to the feeding point 106, for receiving and transmitting the first resonant frequency electrical signal.
In this embodiment, the antenna device may be applied to a transmission line in a left-handed antenna mode, where the transmission line in the left-handed antenna mode is formed by a series capacitor and a parallel inductor of one multiple length, and the transmission line in the left-handed antenna mode is made of a left-handed material. Wherein, the left-handed material is a material with a negative dielectric constant and a negative magnetic permeability. When the electromagnetic wave propagates, the relationship between the wave vector, the electric field and the magnetic field conforms to the left-hand law, so that the electromagnetic wave is called as a left-handed material. The left-handed material has the physical properties of negative phase velocity, negative refractive index, ideal imaging and the like.
One end of the first antenna branch 101 is electrically connected to the ground point 108, that is, the first antenna branch 101 is grounded, and the other end is connected to one end of the feeding branch 103, so as to form a first sub-antenna, and transmit or receive an electrical signal of a first resonant frequency. Accordingly, one end of the feeding branch 103 is already electrically connected to the first antenna branch 101, and the other end is electrically connected to the feeding point 106, so as to transmit the first resonant frequency electrical signal to the feeding point 106 through the feeding branch 103. Where the feed point 106 is the connection point of the feeder for receiving and transmitting point signals, the main task of the feeder is to efficiently transfer the signal energy so that it can transfer the signal power from the transmitter to the transmission line input of the transmitting antenna with minimal loss, or transfer the signal received by the antenna to the transmission line input of the receiver with minimal loss.
In the technical solution provided in the embodiment of the present invention, an antenna device applied to a left-hand antenna mode is provided, in which one end of a first antenna branch is connected to a ground point, the other end of the first antenna branch is connected to one end of a feed branch, similarly, a section of the feed branch is already connected to the first antenna branch, and the other end of the feed branch is connected to a feed point, and a first sub-antenna composed of the first antenna branch and the feed branch can transmit a first resonant frequency electrical signal, so as to improve the practicability of the antenna device.
Optionally, on the basis of the antenna device corresponding to fig. 2 or fig. 3, the antenna device in the embodiment of the present invention may further include:
one port of the second antenna branch 102 is electrically connected with one port of the feed branch 103, and is used for transmitting a second resonant frequency electric signal;
one port of the feeding branch 103 is electrically connected to one port of the second antenna branch 102, and the other port of the feeding branch 103 is electrically connected to the feeding point 106, for receiving and transmitting the second resonant frequency electrical signal.
In this embodiment, referring to fig. 4, fig. 4 is a schematic view of a current model of an antenna apparatus applied to a left-hand scheme, as shown in the figure, a low-frequency current in a left-hand antenna mode is output from a grounding point 108 at one end of a first antenna branch 101 and enters a feeding point 106 after passing through a feeding branch 103, and a high-frequency current in a monopole antenna mode is output from a second antenna branch 102 and also enters the feeding point 106 after passing through the feeding branch 103, because the current needs to pass through a band rejection filter 105 before entering the grounding branch, and the band rejection filter 105 filters out the current which does not meet the requirement of a frequency band range. And only the electric signal within the preset stop band resonant frequency range is output, and the electric signal can stimulate the loop antenna to receive and transmit the electric signal of the third resonant frequency.
In general, a left-handed Antenna can pass a low frequency current and cover a low frequency electrical signal, a monopole Antenna can pass a high frequency current and cover a high frequency electrical signal, and an Inverted-F Antenna (IFA) with a ground stub can pass a new intermediate frequency current and cover an intermediate frequency electrical signal. Thereby realizing full-band coverage and meeting the requirements of three-Carrier Aggregation (CA). After a new grounding branch is added, the high frequency generates one more mode, namely, the mode of intermediate frequency B1+ high frequency B7, the mode of intermediate frequency B3+ high frequency B7 and the requirement of low frequency CA are realized.
Furthermore, in the technical solution provided in the embodiment of the present invention, one end of the second antenna branch in the antenna apparatus is connected to one end of the feed branch, one end of the feed branch is connected to one end of the second antenna branch, and the other end is connected to the feed point, and a second resonant frequency electrical signal can be transmitted through the second antenna branch and the feed branch.
For convenience of understanding, please refer to fig. 5, fig. 5 is a schematic diagram illustrating a standing wave comparison between an antenna apparatus in a conventional left-handed scheme and an antenna apparatus in the present invention, and as shown in the figure, a new mode, i.e., a current return path, is added on the basis of not changing an original left-handed antenna mode, so as to excite a new IFA antenna mode, and the new IFA antenna mode can widen a bandwidth and realize a high frequency without switching.
Referring to fig. 6, fig. 6 is a schematic diagram of the resonant frequency of the antenna apparatus in the new intermediate frequency mode according to the embodiment of the present invention, as shown in the figure, the resonant frequency of the new excited IFA antenna mode can be decreased with the increase of the electrical length of the added grounding stub, and in the process of adjusting the intermediate frequency, since the electrical length of the inductance of the grounding stub is changed only, which is different from the current return of the monopole antenna mode, the monopole antenna mode is not changed. As can be seen from fig. 6, the new antenna mode generated by the added grounding stub does not affect the resonant frequency of the original antenna mode of the antenna device.
Optionally, on the basis of the antenna apparatus corresponding to fig. 7, the antenna apparatus in the embodiment of the present invention may further include:
one port of the first antenna branch 101 is electrically connected with one port of the feed branch 103, and is used for receiving and transmitting a first resonant frequency electric signal;
one port of the feeding branch 103 is electrically connected to one port of the first antenna branch 101, and the other port of the feeding branch 103 is electrically connected to the feeding point 106, for receiving and transmitting the first resonant frequency electrical signal.
In this embodiment, the antenna device can be applied to a transmission line of a T-type antenna mode, which is the most common antenna that is grounded vertically. The antenna is a T-shaped antenna, which is the most common antenna grounded vertically, and the horizontal part of the antenna can have negligible radiation and the vertical part generates radiation.
One port of the first antenna branch 101 is electrically connected to one port of the feeding branch 103 to form a first sub-antenna, and the first sub-antenna can transmit or receive an electrical signal of a first resonant frequency, and transmit the electrical signal of the first resonant frequency to the feeding point 106 through the feeding branch 103. Where the feed point 106 is the connection point of the feeder for receiving and transmitting point signals, the main task of the feeder is to efficiently transfer the signal energy so that it can transfer the signal power from the transmitter to the transmission line input of the transmitting antenna with minimal loss, or transfer the signal received by the antenna to the transmission line input of the receiver with minimal loss.
In the technical solution provided in the embodiment of the present invention, an antenna device applied to a T-type antenna mode is provided, wherein one end of a first antenna branch is electrically connected to one end of a feed branch, one end of the feed branch is already electrically connected to one port of the first antenna branch, and the other end of the feed branch is electrically connected to a feed point, and the first antenna branch and the feed branch receive and transmit an electrical signal of a first resonant frequency, so as to improve the practicability of the antenna device.
Optionally, on the basis of the antenna device corresponding to fig. 7, the antenna device in the embodiment of the present invention may further include a third antenna branch;
the first antenna branch 101 and the third antenna branch 109 form a third sub-antenna for generating an electric signal of a fourth resonant frequency;
the first antenna branch 101 is electrically connected with the third antenna branch 109 and is used for receiving and transmitting a fourth resonant frequency electric signal;
one port of the third antenna stub 109 is electrically connected to the first antenna stub 101, and the other port of the third antenna stub 109 is electrically connected to the ground point 108, and is configured to receive and transmit an electrical signal of a fourth resonant frequency.
In this embodiment, in the T-shaped antenna mode, the first antenna branch 101 is electrically connected to the third antenna branch 109 and forms a third sub-antenna, and the third sub-antenna can transmit or receive a fourth resonant frequency electrical signal, which is an intermediate frequency electrical signal in the long branch 3/4 mode.
The intermediate frequency current in the long branch 3/4 mode is transmitted to the ground point through the first antenna branch 101 and the third antenna branch 109, and the branch through which the intermediate frequency current passes constitutes the third sub-antenna. The first antenna branch 101 and the third antenna branch 109 may be connected in such a manner that one end of the third antenna branch 109 is connected to the first antenna branch 101, and is not limited to the port of the first antenna branch 101, and the other end of the third antenna branch 109 is directly grounded.
In the technical solution provided in the embodiment of the present invention, an antenna device applied to a T-shaped antenna mode is provided, where the first antenna branch and the third antenna branch form a third sub-antenna for generating an electrical signal of a fourth resonant frequency, and the third sub-antenna can be used to receive and transmit the electrical signal of the fourth resonant frequency, so as to improve the practicability of the antenna device.
Optionally, on the basis of the antenna apparatus corresponding to fig. 7, the antenna apparatus in the embodiment of the present invention may further include:
one port of the second antenna branch 102 is electrically connected with one port of the feed branch 103, and is used for receiving and transmitting a second resonant frequency electric signal;
one port of the feeding branch 103 is electrically connected to one port of the second antenna branch 102, and the other port of the feeding branch 103 is electrically connected to the feeding point 106, for receiving and transmitting the second resonant frequency electrical signal.
In this embodiment, referring to fig. 8, fig. 8 is a schematic diagram of a current model of an antenna device applied to a T-type scheme, as shown in the figure, a low-frequency current in the T-type antenna mode flows from a first antenna branch 101 to a feeding point 106 through a feeding branch 103. The high-frequency current in the monopole antenna mode is output from the second antenna branch 102, passes through the feed branch 103, and then enters the feed point 106. The intermediate frequency current in the long leg 3/4 antenna pattern flows from first antenna leg 101 through third antenna leg 109 to ground point 108. The new intermediate frequency current in the new IFA antenna mode is output from the second antenna branch 102 and can pass through the band elimination filter 105 after entering the feeding branch 103, and the band elimination filter 105 can output an electrical signal within the preset stopband resonant frequency range of the symbol to the grounding point 107.
The current flow directions of different frequencies also form a first sub-antenna, a second sub-antenna, a third sub-antenna and a loop antenna, and four groups of sub-antennas can transmit and receive electric signals of different frequencies, so that the original frequency band is widened, and especially for intermediate-frequency and high-frequency signals, the bandwidth of the antenna is obviously increased.
Furthermore, in the embodiment of the present invention, one end of the second antenna branch in the antenna device is electrically connected to one end of the feed branch, one end of the feed branch is already connected to one end of the second antenna branch, and the other end of the feed branch is electrically connected to the feed point, and the sub-antenna formed by the second antenna branch and the feed branch can receive and transmit the second resonant frequency electrical signal. The antenna device can realize the separation of electric signals with different frequencies, independently optimize the electric signals with different frequencies, and therefore the flexibility of the scheme is increased.
For easy understanding, please refer to fig. 9, fig. 9 is a schematic diagram illustrating a simulation comparison of the gain effect after adding a short branch at a feeding point in the embodiment of the present invention, as shown in the figure, in the T-type antenna mode, a low frequency is 1/4 mode of a long branch at the left side of G1, and a high frequency has two resonances, which are 1/4 mode of the short branch at the right side of the feeding point and 3/4 mode of the long branch at the left side of G1, respectively, the feeding point returns to the ground from a front shell, and a resonance from the front shell to the right side 1/4 is additionally generated, i.e., 1.74 GigaHertz (english full name: GigaHertz, abbreviated as GHz) in the figure, and the secondary action does not change the original antenna resonant frequency of the T-type antenna mode. The front shell grounding short branch causes the low-frequency resonance performance to be deteriorated, so that a double low-frequency band elimination filter is required to be added on the front shell grounding short branch, namely the grounding branch, to reduce the influence on the low frequency. The parameters of the filter may be a capacitance of 2.7 picofarads and an inductance of 10 millihenries, however this is only an illustration and does not constitute a limitation of the present antenna arrangement.
Optionally, in the antenna apparatus corresponding to any one of fig. 2, fig. 3, and fig. 7, an embodiment of the present invention further provides an antenna apparatus, where the antenna apparatus may further include a branch adjusting module;
the branch adjusting module is used for adjusting the electrical length of the loop antenna.
In this embodiment, the length of the branch can be adjusted by the branch adjusting module to increase or decrease the distributed electrical length.
For a physical medium, its electrical length is always greater than its physical length. For example, in coaxial cables, distributed resistance, capacitance, and inductance hinder signal transmission, in optical fibers, the interaction between light waves and the material of the optical fibers, and the geometry of the optical fibers, affect the transmission rate of the signals. Whereas for an antenna the effective length of the antenna is often expressed as a multiple of the wavelength.
Furthermore, in the embodiment of the present invention, the electrical length of the loop antenna may be adjusted by the stub adjustment module, so as to embody the flexibility and the practicability of the antenna apparatus.
Optionally, in the antenna apparatus corresponding to any one of fig. 2, fig. 3, and fig. 7, an embodiment of the present invention further provides an antenna apparatus, where the antenna apparatus may further include an inductance module;
the inductance module is connected in series with the ground branch 103 and is used for adjusting the electrical length of the loop antenna by adjusting the inductance strength, and the inductance strength and the electrical length of the loop antenna are in a direct proportion relation.
In this embodiment, an inductive device may be connected in series to the ground branch 103, and a device may be added to the ground branch 103 in a limited environment, so that the electrical length of the ground branch 103 may be changed by connecting the inductive device in series, and the effect is equivalent to the length of the added branch.
The inductance module may be specifically an inductance device, and the inductance affects the electrical length of the loop antenna, in general, the greater the strength of the inductance, the greater the electrical length of the loop antenna, and conversely, the smaller the strength of the inductance, the smaller the electrical length of the loop antenna.
Furthermore, in the embodiments of the present invention, a method for adjusting the electrical length of the loop antenna by adjusting the strength of the inductance is provided, which has a similar effect to that of directly adjusting the electrical length of the loop antenna, thereby improving the flexibility and feasibility of the scheme.
Optionally, in the antenna apparatus corresponding to any one of fig. 2, fig. 3 and fig. 7, an embodiment of the present invention further provides an antenna apparatus, where the band-stop filter 105 in the antenna apparatus is a low-frequency band-stop filter;
the low-frequency band-stop filter comprises a capacitance device and an inductance device, the capacitance device is connected with the inductance device in parallel, and the low-frequency band-stop filter is used for obtaining an electric signal in a preset stop band resonant frequency range by adjusting the capacitance device and the inductance device.
In this embodiment, the band-stop filter 105 may specifically be a low-frequency band-stop filter, and may also adopt an integrated filter device, such as a low-resistance filter and a high-pass filter, where the purpose of adopting the band-stop filter 105 is to obtain an electrical signal within a preset stopband resonant frequency range.
Specifically, the low-frequency band-stop filter can connect an Inductor (L) device and a capacitor (C) device in parallel and generate a resonant frequency, where the resonant frequency needs to satisfy the following conditions:
wherein f is the resonant frequency of the low-frequency band-stop filter, pi is the circumferential rate, L is the inductance, which can take 10 millihenries, and C is the capacitance, which can take 3 picofarads, it should be noted that in practical application, the values of L and C can also be adjusted, which is only one illustration here.
In a circuit including a capacitor and an inductor, if the capacitor and the inductor are connected in parallel, it may happen that the voltage of the capacitor gradually increases and the current gradually decreases in a very small time period, and at the same time, the current of the inductor gradually increases and the voltage of the inductor gradually decreases. In another small time period, the voltage of the capacitor is gradually reduced, the current is gradually increased, meanwhile, the current of the inductor is gradually reduced, and the voltage of the inductor is gradually increased. The voltage can be increased to a positive maximum value, the voltage can be reduced to a negative maximum value, the direction of the current can be changed in the positive and negative directions in the process, the circuit is considered to be electrically oscillated, and the oscillation frequency is the resonant frequency.
In addition, the low-frequency band elimination filter can be further provided with an upper limit frequency and a lower limit frequency, and the electric signals in the upper limit frequency range and the lower limit frequency range are the electric signals in the preset stop band resonant frequency range, so that the required third resonant frequency electric signals can be filtered out, and the influence on the low-frequency signals can be reduced.
Furthermore, the specific type of the band-stop filter provided in the embodiment of the present invention may be implemented by filtering with a low-frequency band-stop filter to obtain an electrical signal within a preset stopband resonant frequency range, so that an electrical signal with a third resonant frequency of a newly added intermediate frequency can be obtained without using a switching device, full-high frequency coverage is implemented, the problem of stray radiation rectification possibly caused by the switching device is reduced, the design risk of the antenna apparatus is also reduced, and meanwhile, the band-stop filter is designed to reduce the influence of a large inductor loaded at a feed point on a low frequency.
As shown in fig. 10, for convenience of description, only the parts related to the embodiment of the present invention are shown, and details of the specific technology are not disclosed, please refer to the method part in the embodiment of the present invention. The terminal may be any terminal device including a mobile phone, a tablet computer, a Personal Digital Assistant (PDA, for short, in english), a Sales terminal (POS, for short, in english), a vehicle-mounted computer, and the like, where the mobile terminal is taken as a mobile phone as an example:
fig. 10 is a block diagram showing a partial structure of a cellular phone related to a mobile terminal provided by an embodiment of the present invention. Referring to fig. 10, the cellular phone includes: radio Frequency (RF) circuit 210, memory 220, input unit 230, display unit 240, sensor 250, audio circuit 260, wireless fidelity (WiFi) module 270, processor 280, and power supply 290. Those skilled in the art will appreciate that the handset configuration shown in fig. 10 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile phone in detail with reference to fig. 10:
the RF circuit 210 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 280; in addition, the data for designing uplink is transmitted to the base station. In general, RF circuit 210 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low noise amplifier (Low noise Amplifier, LNA), a duplexer, and the like. In addition, the RF circuitry 210 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), e-mail, Short Message Service (SMS), and so on.
The memory 220 may be used to store software programs and modules, and the processor 280 executes various functional applications and data processing of the mobile phone by operating the software programs and modules stored in the memory 220. The memory 220 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 220 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The input unit 230 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. Specifically, the input unit 230 may include a touch panel 231 and other input devices 232. The touch panel 231, also referred to as a touch screen, may collect touch operations of a user (e.g., operations of the user on or near the touch panel 231 using any suitable object or accessory such as a finger, a stylus, etc.) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 231 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts it to touch point coordinates, and then provides the touch point coordinates to the processor 280, and can receive and execute commands from the processor 280. In addition, the touch panel 231 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 230 may include other input devices 232 in addition to the touch panel 231. In particular, other input devices 232 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 240 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The Display unit 240 may include a Display panel 241, and optionally, the Display panel 241 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), and the like. Further, the touch panel 231 may cover the display panel 241, and when the touch panel 231 detects a touch operation thereon or nearby, the touch panel is transmitted to the processor 280 to determine the type of the touch event, and then the processor 280 provides a corresponding visual output on the display panel 241 according to the type of the touch event. Although in fig. 10, the touch panel 231 and the display panel 241 are two independent components to implement the input and output functions of the mobile phone, in some embodiments, the touch panel 231 and the display panel 241 may be integrated to implement the input and output functions of the mobile phone.
The handset may also include at least one sensor 250, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel 241 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 241 and/or the backlight when the mobile phone is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
WiFi belongs to short-distance wireless transmission technology, and the mobile phone can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 270, and provides wireless broadband internet access for the user. Although fig. 10 shows the WiFi module 270, it is understood that it does not belong to the essential constitution of the handset, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 280 is a control center of the mobile phone, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 220 and calling data stored in the memory 220, thereby performing overall monitoring of the mobile phone. Alternatively, processor 280 may include one or more processing units; preferably, the processor 280 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 280.
The handset also includes a power supply 290 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 280 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.
Although not shown, the mobile phone may further include a camera, a bluetooth module, etc., which are not described herein.
In the embodiment of the present invention, the RF circuit 210 included in the mobile terminal further has the following structure:
the first antenna branch and the feed branch form a first sub-antenna for generating an electric signal with a first resonant frequency;
the second antenna branch and the feed branch form a second sub-antenna for generating an electric signal of a second resonant frequency;
the second antenna branch, the feed branch and the ground branch form a loop antenna for generating an electric signal of a third resonant frequency, and the electrical length of the loop antenna is 1/4 of the wavelength corresponding to the electric signal of the third resonant frequency;
the band elimination filter is used for filtering electric signals within a preset stop band resonant frequency range and obtaining the electric signals of the third resonant frequency.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above detailed description is provided for a data transmission method provided by the present invention, and the principle and the implementation of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the embodiment of the present invention, the specific implementation manner and the application range may be changed, and in summary, the content of the present specification should not be construed as limiting the present invention.
Claims (9)
1. An antenna device, characterized in that the antenna device comprises a first antenna stub, a second antenna stub, a feed stub, a ground stub and a band-stop filter;
one end of the band elimination filter is electrically connected with the feed branch, and the other end of the band elimination filter is electrically connected with the grounding branch;
the first antenna branch and the feed branch form a first sub-antenna for generating an electric signal with a first resonant frequency;
one port of the first antenna stub is electrically connected with the grounding point, and the other port of the first antenna stub is electrically connected with one port of the feed stub and is used for receiving and transmitting the first resonant frequency electric signal;
one port of the feeding branch is electrically connected with one port of the first antenna branch, and the other port of the feeding branch is electrically connected with a feeding point and used for receiving and sending the first resonant frequency electric signal;
the second antenna branch and the feed branch form a second sub-antenna for generating an electric signal of a second resonant frequency;
the second antenna branch, the feed branch and the ground branch form a loop antenna for generating an electric signal of a third resonant frequency, and the electrical length of the loop antenna is 1/4 of the wavelength corresponding to the electric signal of the third resonant frequency;
the band elimination filter is used for filtering electric signals within a preset stop band resonant frequency range.
2. The antenna device of claim 1,
one port of the second antenna stub is electrically connected with one port of the feed stub and is used for receiving and transmitting the second resonant frequency electric signal;
one port of the feed branch is electrically connected with one port of the second antenna branch, and the other port of the feed branch is electrically connected with the feed point and used for receiving and sending the second resonant frequency electric signal.
3. The antenna device of claim 1,
one port of the first antenna stub is electrically connected with one port of the feed stub and is used for receiving and transmitting the first resonant frequency electric signal;
one port of the feed branch is electrically connected with one port of the first antenna branch, and the other port of the feed branch is electrically connected with the feed point and used for receiving and sending the first resonant frequency electric signal.
4. The antenna device of claim 3, further comprising a third antenna stub;
the first antenna branch and the third antenna branch form a third sub-antenna for generating an electric signal of a fourth resonant frequency;
the first antenna branch is electrically connected with the third antenna branch and used for receiving and transmitting the fourth resonant frequency electric signal;
one port of the third antenna stub is electrically connected with the first antenna stub, and the other port of the third antenna stub is electrically connected with the grounding point and is used for receiving and transmitting the fourth resonant frequency electric signal.
5. The antenna device according to claim 4,
one port of the second antenna stub is electrically connected with one port of the feed stub and is used for receiving and transmitting the second resonant frequency electric signal;
one port of the feed branch is electrically connected with one port of the second antenna branch, and the other port of the feed branch is electrically connected with the feed point and used for receiving and sending the second resonant frequency electric signal.
6. The antenna device according to any one of claims 1 to 5, characterized in that the antenna device further comprises a stub adjustment module;
the branch adjusting module is used for adjusting the electrical length of the loop antenna.
7. The antenna device according to any of claims 1 to 5, characterized in that the antenna device further comprises an inductance module;
the inductance module is connected with the grounding branch in series and used for adjusting the electrical length of the loop antenna by adjusting the inductance strength, and the inductance strength is in a direct proportion relation with the electrical length of the loop antenna.
8. The antenna device according to any of claims 1 to 5, characterized in that the band stop filter is a low frequency band stop filter;
the low-frequency band-stop filter comprises a capacitance device and an inductance device, the capacitance device is connected with the inductance device in parallel, and the low-frequency band-stop filter is used for acquiring an electric signal in the preset stopband resonant frequency range by adjusting the capacitance device and the inductance device.
9. A mobile terminal, comprising: a housing and an antenna device;
the shell is used for placing the antenna device;
the antenna device according to any one of claims 1 to 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016108914575 | 2016-10-12 | ||
| CN201610891457 | 2016-10-12 | ||
| PCT/CN2016/103583 WO2018068344A1 (en) | 2016-10-12 | 2016-10-27 | Antenna apparatus and mobile terminal |
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| Publication Number | Publication Date |
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| CN109348734A CN109348734A (en) | 2019-02-15 |
| CN109348734B true CN109348734B (en) | 2020-12-25 |
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| CN112599975B (en) * | 2020-12-02 | 2023-02-07 | 维沃移动通信有限公司 | Mobile communication device |
| CN113765528B (en) * | 2021-07-23 | 2022-10-14 | 上海闻泰信息技术有限公司 | Reconfigurable antenna, electronic device, and tuning control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879256A (en) * | 2003-11-13 | 2006-12-13 | 日立电线株式会社 | Antenna, method for manufacturing the same and portable radio terminal employing it |
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| WO2008046193A1 (en) * | 2006-10-10 | 2008-04-24 | Vijay Kris Narasimhan | Reconfigurable multi-band antenna and method for operation of a reconfigurable multi-band antenna |
| JP2010288259A (en) * | 2009-05-12 | 2010-12-24 | Panasonic Corp | Antenna apparatus and wireless terminal device |
| CN102884679B (en) * | 2010-12-24 | 2015-08-19 | 松下电器产业株式会社 | Antenna assembly |
| KR101360534B1 (en) * | 2012-04-27 | 2014-02-12 | 한양대학교 산학협력단 | Antenna |
| CN103094717B (en) * | 2013-02-19 | 2017-02-15 | 魅族科技（中国）有限公司 | Antenna of terminal device and terminal device |
| CN104956541A (en) * | 2013-11-22 | 2015-09-30 | 华为终端有限公司 | Adjustable antenna and terminal |
| CN104752833A (en) * | 2013-12-31 | 2015-07-01 | 深圳富泰宏精密工业有限公司 | Antenna assembly and wireless communication device with antenna assembly |
| CN105655710A (en) * | 2015-12-25 | 2016-06-08 | 宇龙计算机通信科技(深圳)有限公司 | Mobile communication terminal, antenna system and antenna adjustment method thereof |
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| CN1879256A (en) * | 2003-11-13 | 2006-12-13 | 日立电线株式会社 | Antenna, method for manufacturing the same and portable radio terminal employing it |
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| WO2018068344A1 (en) | 2018-04-19 |
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