CN115603039A - Butterfly frequency reconfigurable antenna based on TSFPE - Google Patents
Butterfly frequency reconfigurable antenna based on TSFPE Download PDFInfo
- Publication number
- CN115603039A CN115603039A CN202210086108.1A CN202210086108A CN115603039A CN 115603039 A CN115603039 A CN 115603039A CN 202210086108 A CN202210086108 A CN 202210086108A CN 115603039 A CN115603039 A CN 115603039A
- Authority
- CN
- China
- Prior art keywords
- layer
- triangular
- radio frequency
- radiation
- patch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005855 radiation Effects 0.000 claims abstract description 62
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 230000003071 parasitic effect Effects 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a butterfly frequency reconfigurable antenna based on TSFPE, comprising: the antenna comprises a micro-strip-to-balance double-line feeder line 1, a triangular radiation arm 2, a parasitic fractal multi-triangle 3, a radiation patch 4, a radio frequency switch 5 and a dielectric substrate 6; by controlling the on-off state of the radio frequency switch 5, the antenna can work in a high frequency band and a middle frequency band, or the high frequency band and the low frequency band simultaneously, and the switching control is simple.
Description
Technical Field
The invention belongs to the technical field of radio frequency antennas, and particularly relates to a frequency reconfigurable antenna.
Background
Antennas are indispensable and important components of modern wireless communication systems, and with the development of technology, a variety of antennas with novel structures and excellent performance are developed. The document "A Modified Bow-Tie Antenna for Dual Band Applications, RK Joshi, AR Harish, IEEE trans. Antenna Wireless application, leg, 2007 (6): 468-471" proposes a Parasitic Fractal multi-Triangle Structure (TSFPE) with a novel structure, wherein the specific structure is a plurality of Fractal triangles with a certain proportion relationship symmetrically Parasitic (loaded) in the middle of two arms of a disc Antenna, as shown in FIG. 1. In this document, a dual band is achieved by a new frequency band available through the loading of the TSFPE, in addition to the resonant frequency bands of the two arms of the dish. The TSFPE loading method proposed in the literature has the following advantages: the antenna has the advantages of compact structure, capability of respectively and independently adjusting the high frequency band and the low frequency band, and the like.
The goal of a frequency reconfigurable antenna is to have an antenna with multiple switchable operating frequencies without significant changes in the radiation pattern and polarization pattern at each operating frequency. The frequency reconfigurable antenna can be switched and adjusted among different working frequencies according to the requirements of a system, and then the reconfiguration of the working frequencies is realized. Chinese patent document 201510618852.1 discloses a frequency reconfigurable antenna, which realizes switching of two working frequency points of the antenna through a PIN diode. However, in some practical application scenarios, the antenna simultaneously operates in 2 frequency bands, and one of the frequency bands needs to be switched, and the frequency reconfigurable antenna disclosed in the above patent document cannot meet such application scenarios.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a butterfly frequency reconfigurable antenna based on a TSFPE (time series programmable Gate array), which can work in a high frequency band and a medium frequency band or in the high frequency band and the low frequency band simultaneously.
The technical scheme is as follows: the invention adopts the following technical scheme:
a butterfly frequency reconfigurable antenna based on TSFPE comprises a microstrip-to-balance double-line feeder line 1, a triangular radiation arm 2, a parasitic fractal multi-triangle 3, a radiation patch 4, a radio frequency switch 5 and a dielectric substrate 6;
the microstrip-to-balance dual-line feeder 1 comprises an upper-layer transmission line 11, a lower-layer gradual transition line 12 and a lower-layer rectangular ground plane 13; the upper transmission line 11 is positioned on the upper surface of the dielectric substrate 6 and is connected to the upper triangular radiating arm 21; the lower-layer gradually-changing section line 12 and the lower-layer rectangular ground plane 13 are positioned on the lower surface of the dielectric substrate 6, and the lower-layer gradually-changing section line 12 is connected to the lower-layer triangular radiating arm 22;
on the projection surface of the dielectric substrate 6, the upper triangular radiation arm 21 and the lower triangular radiation arm 22 are intersected to form an included angle vertex 7, and the parasitic fractal polytriangle 3 is loaded at the front end region of the included angle vertex 7; the parasitic fractal multi-triangle 3 consists of an upper small triangle 31 and an upper large triangle 32 which are positioned on the upper surface of the dielectric substrate 6, and a lower small triangle 33 and a lower large triangle 34 which are positioned on the lower surface of the dielectric substrate 6;
the radiation patches 4 comprise an upper radiation patch 41 positioned on the upper surface of the dielectric substrate 6 and a lower radiation patch 42 positioned on the lower surface of the dielectric substrate 6; the upper layer radiation patch 41 and the lower layer radiation patch 42 are respectively positioned at the outer side of the triangular radiation arm 2;
the radio frequency switch 5 comprises an upper radio frequency switch 51 positioned on the upper surface of the dielectric substrate 6 and a lower radio frequency switch 52 positioned on the lower surface of the dielectric substrate 6; the upper layer radio frequency switch 51 is connected with the upper layer radiation patch 41 and the upper layer triangular radiation arm 21; the lower rf switch 52 connects the lower radiating patch 42 and the lower triangular radiating arm 22.
Specifically, the upper layer rf switch 51 and the lower layer rf switch 52 are one of a Pin tube switch and a MEME switch or a combination thereof.
Preferably, the internal angle of the upper triangular radiating arm 21 connected to the upper transmission line 11 and the internal angle of the lower triangular radiating arm 22 connected to the lower gradual-change transition line 12 are both 60 °.
Preferably, the device further comprises a control circuit for controlling the on-off state of the radio frequency switch 5.
Preferably, the upper radiation patch 41 and the lower radiation patch 42 are rectangular.
Preferably, the dielectric substrate is a rocky RO4350 material.
Preferably, a trapezoidal compensation patch 8 is also included; the trapezoidal compensation patch 8 comprises an upper trapezoidal patch 81 positioned on the upper surface of the dielectric substrate 6 and a lower trapezoidal patch 82 positioned on the lower surface of the dielectric substrate 6; the upper layer of trapezoidal patches 81 are positioned outside the vertex of the front end of the upper layer of triangular radiation arm 21; the lower trapezoidal patch 82 is located outside the vertex of the front end of the lower triangular radiating arm 22.
Preferably, the microstrip-to-balanced twin feeder 1 feeds, and when the upper layer radio frequency switch 51 and the lower layer radio frequency switch 52 are both off, the antenna simultaneously operates in a high frequency band f3 controlled by the parasitic fractal multi-triangle 3 and a medium frequency band f2 controlled by the triangular radiation arm 2; when the upper layer radio frequency switch 51 and the lower layer radio frequency switch 52 are both connected, the antenna simultaneously works in a high frequency band f3 controlled by the parasitic fractal multi-triangle 3 and a low frequency band f1 controlled by the triangular radiation arm 2 and the radiation patch 4 together.
Preferably, the central resonance frequency points of the three frequency bands f1, f2 and f3 are respectively 8.7GHz, 13.5GHz and 30.7GHz.
Has the advantages that: according to the invention, a butterfly antenna based on a TSFPE structure and a frequency reconfigurable antenna technology are combined, the formed butterfly frequency reconfigurable antenna can work in a high frequency band and a middle frequency band or a high frequency band and a low frequency band simultaneously, and the switching control is simple.
Drawings
Fig. 1 is a butterfly antenna with microstrip-to-two-wire feed;
fig. 2 is a perspective view of a butterfly frequency reconfigurable antenna based on a TSFPE in embodiment 1;
fig. 3 is a schematic diagram of the projection plane of the dielectric substrate of the butterfly-shaped frequency reconfigurable antenna in embodiment 1, where the projection plane is located on the upper surface and the lower surface of the dielectric substrate, and the upper surface and the lower surface are superposed;
fig. 4 is an S11 parameter and a central resonance frequency point directional pattern of the antenna in the f1 frequency band in embodiment 1;
fig. 5 is S11 parameter and central resonant frequency point directional diagram of the antenna in f2 frequency band in embodiment 1;
fig. 6 is S11 parameter and central resonance frequency point directional diagram of the antenna in the f3 frequency band in embodiment 1;
fig. 7 is a perspective view of a butterfly frequency reconfigurable antenna based on a TSFPE in embodiment 2;
fig. 8 is a schematic diagram of the butterfly frequency reconfigurable antenna in embodiment 2, which is located on the upper surface and the lower surface of the dielectric substrate in the projection plane of the dielectric substrate, and the upper surface and the lower surface are superimposed;
fig. 9 is S11 parameter and central resonant frequency point directional diagram of the antenna in f1 frequency band in embodiment 2;
fig. 10 is S11 parameter and central resonance frequency point directional diagram of the antenna in f2 frequency band in embodiment 2;
fig. 11 shows the S11 parameter and the central resonant frequency point pattern of the antenna in the f3 frequency band in embodiment 2.
Detailed Description
The invention is further elucidated with reference to the drawings and the detailed description.
Example 1:
the embodiment discloses a butterfly frequency reconfigurable antenna based on a TSFPE, as shown in fig. 2, including: the antenna comprises a micro-strip-to-balance double-line feeder line 1, a triangular radiation arm 2, a parasitic fractal multi-triangle 3, a radiation patch 4, a radio frequency switch 5 and a dielectric substrate 6;
the microstrip-to-balance double-line feeder line 1 comprises an upper-layer transmission line 11, a lower-layer gradual transition line 12 and a lower-layer rectangular ground plane 13; the upper transmission line 11 is positioned on the upper surface of the dielectric substrate 6 and is connected to the upper triangular radiating arm 21; the lower-layer gradually-changing transition line 12 and the lower-layer rectangular ground plane 13 are positioned on the lower surface of the dielectric substrate 6, and the lower-layer gradually-changing transition line 12 is connected to the lower-layer triangular radiating arm 22; on the projection surface of the medium substrate 6, an upper triangular radiation arm 21 and a lower triangular radiation arm 22 are intersected to form an included angle vertex 7, and the parasitic fractal polytriangle 3 is loaded in the front end region of the included angle vertex 7; the parasitic fractal multi-triangle 3 consists of an upper small triangle 31 and an upper large triangle 32 which are positioned on the upper surface of the dielectric substrate 6, and a lower small triangle 33 and a lower large triangle 34 which are positioned on the lower surface of the dielectric substrate 6; the radiation patch 4 comprises an upper radiation patch 41 positioned on the upper surface of the dielectric substrate 6 and a lower radiation patch 42 positioned on the lower surface of the dielectric substrate 6; the upper radiation patch 41 and the lower radiation patch 42 are respectively positioned at the outer sides of the triangular radiation arm 2 and are rectangular; the radio frequency switch 5 comprises an upper radio frequency switch 51 positioned on the upper surface of the dielectric substrate 6 and a lower radio frequency switch 52 positioned on the lower surface of the dielectric substrate 6; the upper layer radio frequency switch 51 is connected with the upper layer radiation patch 41 and the upper layer triangular radiation arm 21; the lower radio frequency switch 52 is connected with the lower radiation patch 42 and the lower triangular radiation arm 22; in the projection plane of the dielectric substrate of the butterfly-shaped frequency reconfigurable antenna in the present embodiment, a portion located on the upper surface of the dielectric substrate is shown in fig. 3 (a), a portion located on the lower surface of the dielectric substrate is shown in fig. 3 (b), and the projection plane of the dielectric substrate is shown in fig. 3 (c). In this embodiment, the upper rf switch 51 and the lower rf switch 52 are one of a Pin switch and a MEME switch or a combination thereof, and an inner angle between the upper triangular radiating arm 21 and the upper transmission line 11 and an inner angle between the lower triangular radiating arm 22 and the lower gradual transition line 12 are both 60 °.
The working frequency band of the antenna is controlled by controlling the on-off of the radio frequency switch 5, which specifically comprises the following steps:
the microstrip-to-balance double-wire feeder line 1 is used for feeding, and when the upper layer radio frequency switch 51 and the lower layer radio frequency switch 52 are both disconnected, the antenna simultaneously works in a high frequency band f3 controlled by a parasitic fractal multi-triangle 3 and a medium frequency band f2 controlled by a triangular radiation arm 2; when the upper layer radio frequency switch 51 and the lower layer radio frequency switch 52 are both connected, the antenna simultaneously works in a high frequency band f3 controlled by the parasitic fractal multi-triangle 3 and a low frequency band f1 controlled by the triangular radiation arm 2 and the radiation patch 4 together.
The on-off states of the upper rf switch 51 and the lower rf switch 52 are the same, and in this embodiment, the on-off state of the rf switch 5 is controlled by a control circuit having an output terminal. In this embodiment, the central resonance frequency points of the three frequency bands f1, f2, and f3 of the antenna operation are respectively 8.7GHz, 13.5GHz, and 30.7GHz, and the S11 parameter values and the directional patterns of the antenna in the three frequency bands are respectively shown in fig. 5 to 7.
In this embodiment, the relative bandwidths of S11 in the three frequency bands f1, f2, and f3, which are smaller than-10 dB, are 12.7%,18.2%, and 0%, respectively, and the gains at the center resonance frequency point are 3.6dB, 4.3dB, and 5.5dB, respectively.
Example 2:
in order to reduce the discontinuity of the radiation environment around the TSFPE radiation structure caused by the radio frequency switch, the trapezoidal compensation patch 8 is added to the present embodiment based on embodiment 1; as shown in fig. 7, the trapezoidal compensation patches 8 include an upper trapezoidal patch 81 located on the upper surface of the dielectric substrate 6 and a lower trapezoidal patch 82 located on the lower surface of the dielectric substrate 6; the upper layer of trapezoidal patches 81 are positioned outside the vertex of the front end of the upper layer of triangular radiation arm 21; the lower trapezoidal patch 82 is located outside the vertex of the front end of the lower triangular radiating arm 22. In the projection plane of the dielectric substrate of the butterfly frequency reconfigurable antenna in the present embodiment, a portion located on the upper surface of the dielectric substrate is shown in fig. 8 (a), a portion located on the lower surface of the dielectric substrate is shown in fig. 8 (b), and the projection plane of the dielectric substrate is shown in fig. 8 (c). Similar to embodiment 1, the central resonance frequency points of the three frequency bands f1, f2 and f3 of the antenna in this embodiment are 8.7GHz, 13.5GHz and 30.7GHz, respectively, and the S11 parameter values and the directional patterns of the antenna in these three frequency bands are shown in fig. 9-11, respectively. It can be seen from the figure that the forward main lobe directional diagram of the antenna has no obvious distortion and good radiation performance. The relative bandwidths of S11 of the frequency bands f1, f2 and f3, which are smaller than minus 10dB, are respectively 13.7 percent, 18.2 percent and 10.1 percent, and the gains of the central resonance frequency points are respectively 3.5dB, 4.3dB and 7.1dB.
Compared with the embodiment 1, the performance of the antenna in the f3 frequency band is obviously improved, the gain of the central resonance frequency point is increased by 1.6dB, and the relative bandwidth is increased by 10.1%. The embodiment reduces the discontinuity of the radiation environment around the TSFPE radiation structure by adding the trapezoid compensation patch, thereby effectively improving the radiation performance.
Claims (9)
1. A butterfly frequency reconfigurable antenna based on TSFPE, comprising: the antenna comprises a micro-strip-to-balance double-line feeder line (1), a triangular radiation arm (2), a parasitic fractal multi-triangle (3), a radiation patch (4), a radio frequency switch (5) and a dielectric substrate (6);
the microstrip-to-balance double-line feeder (1) comprises an upper-layer transmission line (11), a lower-layer gradually-changed transition line (12) and a lower-layer rectangular ground plane (13); the upper-layer transmission line (11) is positioned on the upper surface of the dielectric substrate (6) and connected to the upper-layer triangular radiating arm (21); the lower-layer gradually-changing transition line (12) and the lower-layer rectangular ground plane (13) are positioned on the lower surface of the dielectric substrate (6), and the lower-layer gradually-changing transition line (12) is connected to the lower-layer triangular radiating arm (22);
on a projection surface of a medium substrate (6), an upper layer triangular radiation arm (21) and a lower layer triangular radiation arm (22) are intersected to form an included angle vertex (7), and a parasitic fractal multi-triangle (3) is loaded at the front end region of the included angle vertex (7); the parasitic fractal multi-triangle (3) is composed of an upper small triangle (31) and an upper large triangle (32) which are positioned on the upper surface of the dielectric substrate (6), and a lower small triangle (33) and a lower large triangle (34) which are positioned on the lower surface of the dielectric substrate (6);
the radiation patch (4) comprises an upper radiation patch (41) positioned on the upper surface of the medium substrate (6) and a lower radiation patch (42) positioned on the lower surface of the medium substrate (6); the upper layer radiation patch (41) and the lower layer radiation patch (42) are respectively positioned at the outer side of the triangular radiation arm (2);
the radio frequency switch (5) comprises an upper layer radio frequency switch (51) positioned on the upper surface of the dielectric substrate (6) and a lower layer radio frequency switch (52) positioned on the lower surface of the dielectric substrate (6); the upper layer radio frequency switch (51) is connected with the upper layer radiation patch (41) and the upper layer triangular radiation arm (21); the lower layer radio frequency switch (52) is connected with the lower layer radiation patch (42) and the lower layer triangular radiation arm (22).
2. Butterfly frequency reconfigurable antenna according to claim 1, characterized in that the upper layer radio frequency switch (51) and the lower layer radio frequency switch (52) are one of a Pin tube switch, a MEME switch or a combination thereof.
3. Butterfly-shaped frequency reconfigurable antenna according to claim 1, characterized in that the internal angles at which the upper triangular radiating arm (21) is connected to the upper transmission line (11) and the internal angles at which the lower triangular radiating arm (22) is connected to the lower tapered transition line (12) are both 60 °.
4. The butterfly frequency reconfigurable antenna of claim 1, further comprising a control circuit that controls an on-off state of the radio frequency switch (5).
5. Butterfly-shaped frequency reconfigurable antenna according to claim 1, characterized in that the upper (41) and lower (42) radiating patches are both rectangular.
6. The butterfly frequency reconfigurable antenna of claim 1, wherein the dielectric substrate is a Rogers RO4350 material.
7. Butterfly frequency reconfigurable antenna according to claim 1, characterized in that it further comprises a trapezoidal compensation patch (8); the trapezoid compensation patch (8) comprises an upper-layer trapezoid patch (81) positioned on the upper surface of the medium substrate (6) and a lower-layer trapezoid patch (82) positioned on the lower surface of the medium substrate (6); the upper layer of trapezoidal patches (81) are positioned on the outer side of the top point of the front end of the upper layer of triangular radiation arm (21); the lower layer of trapezoidal patch (82) is positioned outside the vertex of the front end of the lower layer of triangular radiating arm (22).
8. The butterfly-shaped frequency reconfigurable antenna according to claim 1, characterized in that the microstrip-to-balanced twin feeder (1) feeds, and when the upper layer radio frequency switch (51) and the lower layer radio frequency switch (52) are both off, the antenna simultaneously operates in a high frequency band f3 controlled by the parasitic fractal multi-triangle (3) and a medium frequency band f2 controlled by the triangular radiating arm (2); when the upper radio frequency switch (51) and the lower radio frequency switch (52) are communicated, the antenna simultaneously works in a high frequency band f3 controlled by a parasitic fractal multi-triangle (3) and a low frequency band f1 controlled by a triangular radiation arm (2) and a radiation patch (4) together.
9. The butterfly frequency reconfigurable antenna of claim 8, wherein central resonance frequency points of the three frequency bands f1, f2, and f3 are 8.7GHz, 13.5GHz, and 30.7GHz, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210086108.1A CN115603039B (en) | 2022-01-25 | 2022-01-25 | Butterfly frequency reconfigurable antenna based on TSFPE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210086108.1A CN115603039B (en) | 2022-01-25 | 2022-01-25 | Butterfly frequency reconfigurable antenna based on TSFPE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115603039A true CN115603039A (en) | 2023-01-13 |
| CN115603039B CN115603039B (en) | 2023-11-21 |
Family
ID=84841751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210086108.1A Active CN115603039B (en) | 2022-01-25 | 2022-01-25 | Butterfly frequency reconfigurable antenna based on TSFPE |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115603039B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201466A (en) * | 2014-09-01 | 2014-12-10 | 西安电子科技大学 | Frequency reconfigurable filtering antenna with end-on-fire characteristics |
| CN104241839A (en) * | 2014-09-30 | 2014-12-24 | 东南大学 | Broadband planar bowtie antenna of dual-band trapped wave reflector |
| CN110265775A (en) * | 2019-03-06 | 2019-09-20 | 中国船舶重工集团公司第七二三研究所 | A kind of multiband teledish based on novel compositions loading method |
| CN110518338A (en) * | 2019-08-20 | 2019-11-29 | 西安电子科技大学 | A kind of frequency and the restructural broad-band antenna that polarizes |
-
2022
- 2022-01-25 CN CN202210086108.1A patent/CN115603039B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201466A (en) * | 2014-09-01 | 2014-12-10 | 西安电子科技大学 | Frequency reconfigurable filtering antenna with end-on-fire characteristics |
| CN104241839A (en) * | 2014-09-30 | 2014-12-24 | 东南大学 | Broadband planar bowtie antenna of dual-band trapped wave reflector |
| CN110265775A (en) * | 2019-03-06 | 2019-09-20 | 中国船舶重工集团公司第七二三研究所 | A kind of multiband teledish based on novel compositions loading method |
| CN110518338A (en) * | 2019-08-20 | 2019-11-29 | 西安电子科技大学 | A kind of frequency and the restructural broad-band antenna that polarizes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115603039B (en) | 2023-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110429374B (en) | Broadband dual-polarized filtering base station antenna unit, base station antenna array and communication equipment | |
| US10847902B2 (en) | Enhanced phase shifter circuit to reduce RF cables | |
| US7113133B2 (en) | Dual-band inverted-F antenna with a branch line shorting strip | |
| KR100627764B1 (en) | Printed twin spiral dual band antenna | |
| US6943746B2 (en) | Radio device and antenna structure | |
| CN107706523B (en) | Notch controllable ultra-wideband antenna | |
| US20050264455A1 (en) | Actively tunable planar antenna | |
| US20020126052A1 (en) | Antenna arrangement | |
| KR20010053422A (en) | Miniature printed spiral antenna for mobile terminals | |
| CN108258405B (en) | Directional diagram reconfigurable filtering antenna | |
| KR20020093114A (en) | Multiband antenna arrangement for radio communications apparatus | |
| JP2003174317A (en) | Multi-band patch antenna and skeleton slot radiator | |
| CN1812193B (en) | Inverted-F antenna with double-branch, short-circuit structure | |
| CN110265775B (en) | Multi-band dish antenna based on novel combined loading mode | |
| CN115603039B (en) | Butterfly frequency reconfigurable antenna based on TSFPE | |
| US11152713B2 (en) | Corner antenna array devices, systems, and methods | |
| CN116345164A (en) | Ku frequency band broadband double circularly polarized microstrip antenna | |
| CN211829185U (en) | Base station antenna | |
| CN105428797A (en) | Three frequency band metamaterial-loaded small-sized monopole antenna | |
| CN107681235B (en) | Ultra-wideband band-pass filter with compact structure | |
| WO2024092412A1 (en) | Dual-frequency antenna, antenna array, and electronic device | |
| US11770164B2 (en) | Bypassable radio frequency filters | |
| CN115548658B (en) | X/Ku frequency band frequency reconfigurable butterfly antenna based on bias network | |
| Rawal et al. | A compact slotted rectangular planar antenna with frequency reconfigurability | |
| Deb et al. | A Printed 4x4 MIMO Radiator for Dual band Applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |