CN215869786U - Dual-band composite antenna unit and antenna array - Google Patents
Dual-band composite antenna unit and antenna array Download PDFInfo
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- CN215869786U CN215869786U CN202120092755.4U CN202120092755U CN215869786U CN 215869786 U CN215869786 U CN 215869786U CN 202120092755 U CN202120092755 U CN 202120092755U CN 215869786 U CN215869786 U CN 215869786U
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Abstract
The utility model relates to a dual-band composite antenna unit and an antenna array, which comprise an antenna substrate and a cross-shaped L-band patch arranged in the middle of the antenna substrate, wherein the L-band patch uniformly divides the antenna substrate into four areas, and a C-band patch is attached to each area.
Description
Technical Field
The utility model relates to the field of antennas, in particular to a dual-band composite antenna unit and an antenna array.
Background
The antenna unit is the minimum unit in the antenna array, and is generally designed according to the working frequency band of the antenna, and the traditional antenna unit can only work in a single frequency band and cannot realize the simultaneous transceiving of multi-band signals.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcome the disadvantages of the prior art, and to provide a dual-band composite antenna unit and an antenna array, which can implement the transceiving of dual-band signals, thereby enhancing the performance of transceiving signals of the antenna.
The purpose of the utility model is realized by the following technical scheme:
the utility model provides a dual-band composite antenna unit, includes the antenna substrate to and set up the crisscross L wave band paster at antenna substrate middle part, the L wave band paster evenly divides the antenna substrate into four regions, pastes a slice C wave band paster in every region.
Furthermore, the C-band patch adopts a double-layer patch to realize 15% bandwidth.
Further, the L-band patch and the C-band patch are microstrip patches.
Furthermore, the L-band patch adopts a double-layer patch to realize double-frequency work of an L1 band and an L2 band.
Further, the normal gain of the L1 band is about 32.1dBi, and the 60 ° scan angle gain is about 27.8 dBi. The normal beam width is about 3.1 deg. by 3.1 deg., and the 60 deg. direction is scanned with a beam width of about 6.1 deg..
Further, the normal gain of the L2 band is about 28.3dBi, and the 30 ° scan angle gain is about 27.2 dBi. The normal beam width is about 5.6 deg. by 5.6 deg., and the beam width is about 6.4 deg. for the direction of 30 deg. scan.
Further, the C-band patch normal gain is about 41.2dBi and the 60 ° scan angle gain is about 36.5 dBi. The 3.7GHz normal beam width is about 1.4 deg. x 1.4 deg., and the 60 deg. direction is scanned by about 2.8 deg..
An antenna array is composed of dual-band composite antenna elements.
Furthermore, in the antenna array, the distance between the C-band antennas and the arrangement mode are formed by mixing a triangular array and a rectangular array.
Furthermore, in the antenna array, 4328C-band patches and 1082L-band patches are provided.
The utility model has the beneficial effects that: according to the scheme, the L-waveband and C-waveband antenna patches are integrated on the same microstrip antenna, so that the antenna can work in the L-waveband and the C-waveband simultaneously, the reliability of receiving signals by the antenna is improved, and the capability of receiving signals by the antenna is enhanced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of an antenna array layout;
FIG. 3 is an L1 band (1.7 GHz) directional diagram;
FIG. 4 is an L2 band (1.29 GHz) directional pattern
FIG. 5 is a C-band (3.7 GHz) directional diagram;
FIG. 6 is a diagram of transmit-to-receive interference;
fig. 7 is an enlarged schematic view of the subarray distribution.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a dual-band composite antenna unit includes an antenna substrate 1, and a cross-shaped L-band patch 3 disposed in the middle of the antenna substrate 1, wherein the L-band patch 3 uniformly divides the antenna substrate 1 into four regions, and a C-band patch 2 is attached to each region.
Optionally, in the dual-band composite antenna unit, the C-band patch 2 is a dual-layer patch to realize a 15% bandwidth.
Optionally, in the dual-band composite antenna unit, the L-band patch 3 and the C-band patch 2 are microstrip patches.
Optionally, in the dual-band composite antenna unit, the L-band patch 3 adopts a dual-layer patch to implement dual-band operation in the L1 band and the L2 band.
As shown in fig. 3, the normal gain of the L1 band is about 32.1dBi and the 60 ° scan angle gain is about 27.8 dBi. The normal beam width is about 3.1 deg. by 3.1 deg., and the 60 deg. direction is scanned with a beam width of about 6.1 deg..
As shown in fig. 4, the antenna side lobe requirement is greater than 35dB, which is achieved by taylor weighting of the amplitudes. After weighting, the normal gain of the L2 band was about 28.3dBi and the 30 ° scan angle gain was about 27.2 dBi. The normal beam width is about 5.6 deg. by 5.6 deg., and the beam width is about 6.4 deg. for the direction of 30 deg. scan.
As shown in fig. 5, the C-band patch 2 has a normal gain of about 41.2dBi and a 60 ° scan angle gain of about 36.5 dBi. The 3.7GHz normal beam width is about 1.4 deg. x 1.4 deg., and the 60 deg. direction is scanned by about 2.8 deg..
An antenna array is composed of dual-band composite antenna elements.
Optionally, in the antenna array, the distance between C-band antennas and the arrangement mode are formed by mixing a triangular array and a rectangular array, and the structure of the antenna array is shown in fig. 2.
More specifically, as shown in fig. 7, a small rectangle in the figure represents a sub-array, but a triangular array is adopted between the sub-arrays, that is, the sub-arrays are arranged in a delta shape as shown in fig. 7, that is, a triangular array is formed between the sub-arrays.
Optionally, an antenna array is composed of dual-band composite antenna units, where in the antenna array, 4328C-band patches 2 and 1082L-band patches 3 are provided.
The number of channels in the L2 frequency band is 1082, the single-channel output power is 37dBm, the line loss from the antenna to the TR is 0.9dB (including a filter and a circulator), and the antenna cover loss is 0.3 dB. The antenna array normal gain is 28.3 dBi; the antenna array gain is 27.2dBi when the beam is swept to 30 °. Antenna ERIP:
37+10log1082+28.3-0.9-0.3=94.4dBm @ normal;
37+10log1082+27.2-0.9-0.3=93.3dBm @30°；
in summary, the antenna scans the 30 ° range ERIP greater than 93.3 dBm.
G/T value analysis is received at the L1 wave band, and the normal gain of the antenna array is 32.1 dBi; when the wave beam is scanned to 60 degrees, the gain of the antenna array is 27.8 dBi; the background noise temperature is 70K, the noise coefficient of the TR component is 0.6dB, the line loss (including a filter) from the antenna to the TR is 0.8dB, the antenna housing loss is 0.6dB, and the G/T value of the antenna is as follows:
32.1-10log (70 + (10 (0.6 + 0.8)/10-1) x 290) -0.6=8.9dB/K @ normal;
27.8-10log（70+（10（0.6+0.8）/10-1）×290）-0.6=4.6 dB/K @60°；
in conclusion, the G/T value of the antenna scanning 60-degree range is larger than 4.6 dB/K.
G/T value analysis is received by an L2 wave band; the antenna array normal gain is 28.3 dBi; when the wave beam is scanned to 30 degrees, the gain of the antenna array is 27.2 dBi; the background noise temperature is 70K, the noise coefficient of the TR component is 0.5dB, the line loss from the antenna to the TR is 0.9dB (including a filter and a circulator), the antenna housing loss is 0.3dB, and the G/T value of the antenna is as follows:
28.3-10log (70 + (10 (0.5 + 0.9)/10-1) x 290) -0.3=5.44dB/K @ normal
27.2-10log（70+（10（0.5+0.9）/10-1）×290）-0.3=4.34dB/K @30°
In conclusion, the G/T value of the antenna scanning 30-degree range is larger than 4.3 dB/K.
C-band receiving G/T value analysis, wherein the normal gain of the antenna array is 41.2 dBi; when the wave beam is scanned to 60 degrees, the gain of the antenna array is 36.5 dBi; the background noise temperature is 70K, the noise coefficient of the TR component is 0.6dB, the line loss from the antenna to the TR component is 0.2dB, the antenna housing loss is 0.8dB, and the G/T value of the antenna is as follows:
41.2-10log (70 + (10 (0.6 + 0.2)/10-1) x 290) -0.8=19.3dB/K @ normal
36.5-10log（70+（10（0.6+0.2）/10-1）×290）-0.8=14.6dB/K @60°
In conclusion, the G/T value of the antenna scanning 60-degree range is larger than 14.6 dB/K.
Beam scanning range analysis, when the rectangular antenna array is scanned, no side lobe constraint condition occurs:
d is the unit antenna spacing, the maximum scan angle, and the minimum wavelength of the operating frequency.
When the triangular array antenna array is scanned, no side lobe constraint condition occurs:
dx is the distance between the x-direction unit antennas, dy is the distance between the y-direction unit antennas, and is the maximum scanning angle, the minimum wavelength of the working frequency and the triangular array included angle.
From the above formula, it can be seen that:
the L1 wave band is rectangular arrangement, the maximum scanning angle is 60 degrees, then d is less than or equal to 94mm, the actual arrangement distance is 75mm multiplied by 80.8mm, and the requirement of no grating lobe generation is met.
The L2 wave band is rectangular arrangement, the maximum scanning angle is 30 degrees, then d is less than or equal to 153mm, the actual arrangement distance is 75mm multiplied by 80.8mm, and the requirement of no grating lobe generation is met.
The C wave band is triangular arrangement, the maximum scanning angle is 60 degrees, then dx is less than or equal to 38.2mm, dy is less than or equal to 44.2mm, the actual arrangement distance is 37.5mm multiplied by 40.4mm, and the requirement of no grating lobe generation is met.
In conclusion, the system index requirements can be met.
And (3) analyzing the beam width, and calculating the directional diagram to know that the beam width of the antenna is as follows:
the normal beamwidth of the L1 band is about 3.1 ° x 3.1 °, and the beamwidth is about 6.1 ° for the 60 ° direction of the scan.
The L2 wave band has a normal beam width of about 5.6 deg. by 5.6 deg., and a beam width of about 6.4 deg. for a 30 deg. scan.
The C-band normal beam width is less than 1.4 ° × 1.4 °, and the scanning 60 ° direction beam width is less than 2.8 ° (when the pattern is calculated, the low frequency 3.7GHz with the largest beam width is used).
The antenna receives and transmits in parallel on three wave bands of L1, L2 and C, wherein the wave band of L1 is 1670 MHz-1710 MHz, the wave band of L2 is 1290MHz +/-10 MHz, the wave band of C is 3.625 GHz-4.2 GHz, and the frequency ratio exceeds 3. Meanwhile, the range of the pitch angle of the satellite which can be normally received by the device is more than or equal to 30 degrees, so that the phased array antenna is required to have high gain and wide angle coverage characteristics at the same time. Therefore, designing a phased array unit with a large frequency ratio, high gain, and wide angular coverage is one of the key technologies to achieve triple frequency sharing. The antenna unit is designed by adopting 4C-band antennas and 1L-band antenna with the same caliber as that of the antenna unit shown in figure 1, and the L-band antenna adopts dual-frequency dual-linear polarization. The C-band antenna adopts a double-layer patch to realize 15% of bandwidth, and the L-band antenna adopts a double-layer patch to realize double-frequency work, so that not only can the three high and low bands be ensured to have no grating lobe in a real space, but also the design requirement of common aperture of the three bands is met.
When the three wave bands work simultaneously, the analog devices may generate clutter, crosstalk, intermodulation and other reactions under the high-frequency radiation of the opposite side, and the channel signal effects of the analog devices are influenced. This requires that our design can fully isolate the electromagnetic influence of multiple bands, and take shielding, isolating, grounding and other precautionary measures. For a full-duplex antenna, analysis is mainly performed on two aspects of the influence of a transmission signal on reception and the influence of transmission noise on reception. The effect of transmission on reception is shown in fig. 6.
The isolation analysis between the antennas can provide support for the design of a transmit-stop filter of a subsequent receiving circuit, and because the transmitting frequency is different from the receiving frequency, the following two points need to be paid attention to during the design, so that the influence of a transmitting system on the receiving performance can be avoided.
The main control measures are as follows:
the receiving end effectively restrains the transmitted signal through a low-loss and high-out-of-band restraining filter;
and a receiving and blocking filter is added after the transmitting and power amplifying, so that the noise and stray of each receiving wave band are inhibited, and the fact that the out-of-band noise of a transmitting end is coupled to the level of the receiving antenna port surface does not cause the deterioration of the signal-to-noise ratio is ensured.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. The utility model provides a dual-band composite antenna unit, its characterized in that includes antenna substrate (1) to and set up crisscross L wave band paster (3) at antenna substrate (1) middle part, L wave band paster (3) evenly divide antenna substrate (1) into four regions, pastes a slice C wave band paster (2) in every region.
2. The dual band composite antenna element according to claim 1, characterized in that said C-band patch (2) is implemented with a double layer patch for 15% bandwidth.
3. A dual band composite antenna element according to claim 2, characterized in that said L-band patch (3) and C-band patch (2) are microstrip patches.
4. The dual band composite antenna element according to claim 2, characterized in that said L-band patch (3) is a double-layered patch for dual-band operation in the L1 band and the L2 band.
5. The dual band composite antenna element of claim 4, wherein said L1 band has a normal gain of about 32.1dBi, a 60 ° scan angle gain of about 27.8dBi, a normal beam width of about 3.1 ° × 3.1 °, and a 60 ° scan direction beam width of about 6.1 °.
6. The dual band composite antenna element of claim 4, wherein said L2 band has a normal gain of about 28.3dBi, a 30 ° scan angle gain of about 27.2dBi, a normal beam width of about 5.6 ° × 5.6 °, and a scan 30 ° beam width of about 6.4 °.
7. The dual band composite antenna element according to claim 5, wherein the C-band patch (2) has a normal gain of about 41.2dBi, a 60 ° scan angle gain of about 36.5dBi, a 3.7GHz normal beam width of about 1.4 ° × 1.4 °, and a 60 ° scan direction beam width of about 2.8 °.
8. An antenna array comprising a dual band composite antenna element as claimed in any of claims 1 to 7.
9. The antenna array of claim 8, wherein the C-band antennas are spaced apart and arranged in a mixture of triangular and rectangular arrays.
10. The antenna array of claim 9, wherein the number of C-band patches (2) is 4328 and the number of L-band patches (3) is 1082.
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| CN202120092755.4U CN215869786U (en) | 2021-01-14 | 2021-01-14 | Dual-band composite antenna unit and antenna array |
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| CN202120092755.4U CN215869786U (en) | 2021-01-14 | 2021-01-14 | Dual-band composite antenna unit and antenna array |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117175196A (en) * | 2023-03-16 | 2023-12-05 | 广州程星通信科技有限公司 | Common-caliber antenna array |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117175196A (en) * | 2023-03-16 | 2023-12-05 | 广州程星通信科技有限公司 | Common-caliber antenna array |
| CN117175196B (en) * | 2023-03-16 | 2024-04-12 | 广州程星通信科技有限公司 | Common-caliber antenna array |
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