CN109149091B - Interdigital coupling short circuit band reconfigurable circularly polarized antenna based on PIN diode control - Google Patents
Interdigital coupling short circuit band reconfigurable circularly polarized antenna based on PIN diode control Download PDFInfo
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- CN109149091B CN109149091B CN201810821605.5A CN201810821605A CN109149091B CN 109149091 B CN109149091 B CN 109149091B CN 201810821605 A CN201810821605 A CN 201810821605A CN 109149091 B CN109149091 B CN 109149091B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
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Abstract
The invention provides an interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control, which comprises: the device comprises a dielectric plate, a coupling band, a PIN diode, a short-circuit band, a radiation patch, a short-circuit PIN and a ground plane. The PIN diode is conducted by applying voltage to the PIN diode, and the PIN diode can be equivalent to a resistor; when the PIN diode is not electrified, the PIN diode is disconnected, and the PIN diode can be equivalent to a loading capacitor. Therefore, the equivalent reactance value of the PIN diode is changed through the on-off of the PIN diode, and then the antenna is switched between the GPS-L1 frequency band and the BDS-L frequency band. Has the advantages of miniaturization, multiband and reconstruction.
Description
Technical Field
The invention relates to an antenna, in particular to an interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control.
Technical Field
With the development of satellite navigation systems, BDS systems will enter a fully deployed state, and especially the application scenarios of GPS and BDS systems have become a popular research direction. The research on the circular polarization antenna with the common caliber and the reconfigurable frequency has important practical significance. The conventional CP patch antenna is characterized by a low profile, light weight, and easy manufacture. However, there are also some disadvantages such as narrow bandwidth, large electrical size and narrow side radiation. To remedy these deficiencies, many researchers have conducted extensive research to improve these properties. For example, in order to adjust the broadband impedance characteristics, the document Jeen-Screen Row and Shiao-Wen Wu, "circular-Polarized Wide Slot Loaded With a Parasitic Patch," IEEE transactions. Antennas Propag., vol. 56, pp. 2826-2832, 2008 proposes a Circularly Polarized Patch Antenna designed by loading a Slot and a Parasitic Patch. The documents Hang Wong, kwok Kan So, kung Bo Ng, kwai Man Luk, chi Hou Chan, and quant Xue, "virtual short supported Antenna for Circular Polarization," IEEE Antennas with cross slots and proximity coupling feed, vol 9, pp 1213-1216, 2010 propose a circularly polarized Antenna with a cross slot and proximity coupling feed, the Antenna size can be reduced by about 36%, the 2dB axial ratio bandwidth is 0.65%. However, the working frequency of the antenna is not variable after the design is completed, and the application of the antenna is limited. And these antennas also have the disadvantages of complicated structure, low gain, or narrow AR bandwidth.
Disclosure of Invention
The invention discloses a small circularly polarized antenna, which utilizes an interdigital coupling structure loaded by a PIN diode to achieve frequency switching, and realizes miniaturization by loading a short circuit PIN and a parasitic element. The defects of large size and unswitchability of frequency in the conventional antenna are overcome.
The invention is realized by the following technical scheme:
an interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control comprises: the antenna comprises a dielectric plate, a coupling strip, a PIN diode, a short-circuit strip, a radiation patch, a short-circuit PIN and a ground plane; the coupling strip and the radiation patch form a coupling structure; one end of the short-circuit strip and the coupling strip form an interdigital coupling structure, and the PIN diode is inserted between the interdigital coupling structures; the other end of the shorting strip is connected to the ground plane through a shorting pin. The PIN diode is conducted by applying voltage to the PIN diode, and the PIN diode is equivalent to a resistor; when the PIN diode is not electrified, the PIN diode is disconnected, and the PIN diode is equivalent to a loading capacitor at the moment. The radiating patch is square and is fed by the feed probe. The four coupling bands are positioned outside the radiation patch and are parallel to two diagonal lines of the square radiation patch. And four pairs of branches are loaded, and the branches are loaded near four corners of the square radiation patch and are arranged close to the edge of the radiation patch. The technical scheme of the invention has the advantages of miniaturization, multiband and reconfigurability.
Drawings
Fig. 1 is a front view of a cross-coupled short-circuit band reconfigurable circularly polarized antenna based on PIN diode control according to the present invention;
FIG. 2 is a side view of the cross-coupled short-circuit band reconfigurable circularly polarized antenna based on PIN diode control according to the present invention;
FIG. 3 shows the return loss of the interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control, which is provided by the invention, working in the GPS-L1 frequency band;
FIG. 4 shows return loss of the interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control, which works in the BDS-L frequency band;
FIG. 5 shows that the interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control works in the 3 dB AR bandwidth of the GPS-L1 frequency band;
FIG. 6 shows that the interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control works in 3 dB AR bandwidth of BDS-L frequency band;
FIG. 7 is a radiation pattern of the interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control, working in a GPS-L1 frequency band;
fig. 8 is a radiation pattern of the interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control, which is provided by the invention and works in the BDS-L frequency band.
2: a coupling band; 3: a PIN diode; 4: a short-circuit belt; 5: branch knot loading; 6: a feed probe; 7: a radiation patch; 8: a shorting pin; 9: a ground plane.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples.
As shown in fig. 1-2, the structure of the antenna of the present invention comprises a coupling strip 2, a pin diode 3, a short-circuit strip 4, a stub load 5, a feed probe 6, a radiation patch 7, a short-circuit pin 8, and a ground plane 9. The radiating patch 7 may be square and located on one surface of the dielectric plate and fed by the feed probe 6. The four coupling strips 2 are located outside the square radiation patch 7 and are parallel to two diagonals of the square radiation patch 7. A PIN diode 3 is inserted between the interdigital coupling structure formed by the short-circuit strip 4 and the coupling strip 2. The ends of the shorting strip 4 are connected to the ground plane by shorting pins. The stub loads 5 are located near the four corners of the square radiation patch 7, near the edges of the radiation patch 7. The PIN diode is conducted by applying voltage to the PIN diode, the PIN diode can be equivalent to a resistor at the moment, and the antenna works in a GPS-L1 frequency band (1575.42 MHz); when the PIN diode is not electrified, the PIN diode is disconnected, the PIN diode can be equivalent to a loading capacitor at the moment, and the antenna works in a BDS-L (1610 MHz-1.6265 GHz) frequency band. Therefore, the equivalent reactance value of the PIN diode is changed through the on-off of the PIN diode, and then the antenna is switched between the GPS-L1 frequency band and the BDS-L frequency band.
The PIN diode can use BAR64-02LRH model, and FR4 material can be used as the medium board. The loading of the interdigital coupling structure enlarges the adjustable range of the frequency. The antenna can also be miniaturized by slotting the corner end of the radiation patch, and loading the branch and the short circuit strip.
FIGS. 3-4 show the return loss of this embodiment operating in the GPS-L1 band (1575.42 MHz) and BDS-L band (1610 MHz-1.6265 GHz). Simulation and actual measurement results show that the antenna can realize the switching of two frequencies, and the actual measurement results also meet the performance requirements.
FIGS. 5-6 illustrate the 3 dB AR bandwidth of this embodiment operating in the GPS-L1 band and the BDS-L band. It can be seen from the figure that the measurement results are biased because the CP performance is sensitive to size variation and processing errors are unavoidable, but the CP performance in the high frequency band is better. Experiments show that the four rectangular gaps and the branches can increase the current path, effectively reduce the resonance frequency and have the broadband characteristic. In order to obtain better circular polarization performance, the length ratio of adjacent branches can be adjusted. The current rotating directions of the two frequency bands are observed on simulation software, so that the radiation is right-hand circularly polarized radiation.
Fig. 7-8 show the radiation patterns of the present embodiment operating in the GPS-L1 band and BDS-L band. It can be seen from the figure that the measured radiation pattern of each frequency band fits well with the simulated values. The difference between the simulation and the measurement may be due to impedance mismatch of the PIN diode and the capacitor.
A circularly polarized reconfigurable antenna is presented. By controlling the state of the PIN diode, the performance of frequency switching between the GPS-L1 frequency band and the BDS-L frequency band is obtained, has good impedance matching performance and wide bandwidth. Compared with the common microstrip patch antenna, the size is reduced by 52%.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. An interdigital coupling short-circuit band reconfigurable circularly polarized antenna based on PIN diode control comprises: the antenna comprises a dielectric plate, a coupling strip, a PIN diode, a short-circuit strip, a radiation patch, a short-circuit PIN and a ground plane;
the radiation patch is square and is fed by a feed probe;
the coupling strip and the radiation patch form a coupling structure; the four coupling bands are positioned outside the square radiation patch and are parallel to two diagonal lines of the square radiation patch;
one end of the short-circuit strip and the coupling strip form an interdigital coupling structure, and the PIN diode is inserted between the interdigital coupling structures; the other end of the short-circuit belt is connected to the ground plane through a short-circuit pin;
the PIN diode is conducted by applying voltage to the PIN diode, and the PIN diode is equivalent to a resistor; when the PIN diode is not electrified, the PIN diode is disconnected, and the PIN diode is equivalent to a loading capacitor at the moment.
2. The interdigital coupled short-circuit band reconfigurable circularly polarized antenna based on PIN diode control as claimed in claim 1, wherein: the loading of four pairs of branches is also included, and the branches are loaded near four corners of the square radiation patch and are arranged close to the edge of the radiation patch.
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| CN201810821605.5A CN109149091B (en) | 2018-10-27 | 2018-10-27 | Interdigital coupling short circuit band reconfigurable circularly polarized antenna based on PIN diode control |
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| CN113097710B (en) * | 2021-03-30 | 2022-09-06 | 大连理工大学 | Dual-mode circularly polarized frequency reconfigurable antenna |
| CN113782972A (en) * | 2021-07-30 | 2021-12-10 | 北京邮电大学 | Multi-band reconfigurable microstrip antenna |
| CN114628893A (en) * | 2022-04-13 | 2022-06-14 | 安徽大学 | S-band frequency reconstruction orbital angular momentum antenna and frequency reconstruction method |
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| US9837702B2 (en) * | 2015-03-06 | 2017-12-05 | King Fahd University Of Petroleum And Minerals | Cognitive radio antenna assembly |
| CN204905443U (en) * | 2015-07-17 | 2015-12-23 | 深圳市华颖泰科电子技术有限公司 | Circular polarization reconfigurable microstrip antenna |
| CN204885428U (en) * | 2015-07-22 | 2015-12-16 | 深圳市华颖泰科电子技术有限公司 | Dual -frenquency double polarization restructural microstrip antenna |
| CN205583130U (en) * | 2016-05-05 | 2016-09-14 | 成都北斗天线工程技术有限公司 | Circular polarization microstrip antenna |
| CN106329099B (en) * | 2016-08-29 | 2019-06-07 | 重庆邮电大学 | Broadband circle polarized filter antenna applied to Beidou terminal |
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