CN217544917U - Conical four-arm sine navigation interference antenna - Google Patents
Conical four-arm sine navigation interference antenna Download PDFInfo
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- CN217544917U CN217544917U CN202220621460.6U CN202220621460U CN217544917U CN 217544917 U CN217544917 U CN 217544917U CN 202220621460 U CN202220621460 U CN 202220621460U CN 217544917 U CN217544917 U CN 217544917U
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Abstract
The utility model belongs to four arm sinusoidal antenna, for solving present navigation's anti-interference test, for adapting to different navigation frequency channels, often need to change the interference antenna who corresponds with it, and current sinusoidal antenna also can't satisfy the technical problem of navigation test demand, provides a four arm sinusoidal navigation interference antenna of taper, including first dielectric plate and second dielectric plate. The first medium plate is a hollow circular truncated cone-shaped plate with openings at two ends, and the second medium plate is a circular plate. The second medium plate is connected to the bottom of the first medium plate and encloses a circular truncated cone-shaped space together with the first medium plate. Two connectors are arranged on the second medium plate. The outer surface of the first dielectric plate is provided with a four-arm sine antenna body, and a feed network is embedded in the first dielectric plate. The input end of the feed network is connected with the two connectors, and the two output ends of the feed network are respectively and simultaneously connected with the two opposite sine arms in the four-arm sine antenna body.
Description
Technical Field
The utility model belongs to four arm sinusoidal antennas, concretely relates to four arm sinusoidal navigation interference antennas of taper.
Background
With the development of the application of the navigation system, the requirement on the anti-interference performance of the navigation system is gradually improved. Therefore, a great demand is placed on the anti-interference test of the navigation system, but in the actual test, because the navigation frequency band is more, a plurality of sets of interference sources need to be configured to perform in-band co-channel interference on the satellite navigation receiving antenna, and in order to adapt to different navigation frequency bands, the corresponding interference antenna needs to be replaced frequently.
The sine antenna is wide in frequency range, so that the sine antenna can be used for anti-interference testing of a navigation system. In the < Attitution aided space-time multi-beam former anti-jamming approach for satellite navigation receiver </i > published in International Conference on Signal Processing by Wang D, li J, gong W et al 2015, a planar four-arm sine antenna is proposed, which consists of a planar radiation antenna, a balancer and a reflection cavity, and has higher gain, but the bandwidth is only 100MHz, and the volume is also too large. In "A Four-arm Circuit Polarized High-gain High-tilt Beam Antenna for Beam Steering Applications", published in "IEEE Antennas & Wireless Provisions Letters", zhou H, pal A, mehta A, et al 2018, sinusoidal Antennas are also mentioned, which are realized by using two arms, but the switching between left and right rotary polarization is not realized. In addition, the two sinusoidal antennas cannot meet the test requirements of the satellite navigation system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve present navigation's anti-interference test, for adapting to different navigation frequency channels, often need to change the interference antenna who corresponds with it, and current sinusoidal antenna also can't satisfy the technical problem of navigation test demand, provide a taper quadrifilar sinusoidal navigation interference antenna.
In order to achieve the above object, the utility model provides a following technical scheme:
a conical four-arm sine navigation interference antenna is characterized by comprising a first dielectric plate and a second dielectric plate;
the first medium plate is a hollow circular truncated cone-shaped plate with openings at two ends, and the second medium plate is a circular plate; the second dielectric plate is connected to the bottom of the first dielectric plate and encloses a circular truncated cone-shaped space together with the first dielectric plate;
two connectors are arranged on the second dielectric plate;
the outer surface of the first dielectric plate is provided with a four-arm sine antenna body, and a feed network is embedded in the first dielectric plate;
the input end of the feed network is respectively connected with the two connectors, and the two output ends of the feed network are respectively and simultaneously connected with the two opposite sine arms in the four-arm sine antenna body.
Further, the feed network comprises a coupler and two balancers;
the input ends of the couplers are respectively connected with the two connectors, the two output ends of the couplers are respectively connected with the input ends of the two balancers, and the output ends of the two balancers are respectively and simultaneously connected with two opposite sine arms in the four-arm sine antenna body;
the two outputs of the coupler have a phase difference of 90 °.
Further, the balancer is a balun.
Further, the balun is a broadband gradual change balun.
Further, the feed network further comprises two metal connecting lines;
the two metal connecting lines are respectively connected with the output ends of the two balancers, and two ends of each metal connecting line are respectively connected with the two opposite sine arms.
Further, the first dielectric plate is an FR4 plate having a dielectric constant of 4.4.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses four arm sinusoidal navigation interference antenna of taper utilizes four arm sinusoidal antenna bodies, structurally realizes with the toper form, does not need ground plane or reflection chamber to obtain the unidirectional radiation, has given up the reflection chamber, has reduced actual size, in addition, has satisfied the switching of levogyration circular polarization and dextrorotation circular polarization through using the coupler.
2. The utility model discloses four arm sinusoidal navigation interference antenna of taper, through the emulation verification, the frequency channel can cover 1-3GHz, and the emulation has better axial ratio and front-to-back ratio, and the gain all is greater than 4dB in the bandwidth. In addition, on the basis of simulation, the real object test analysis is also carried out, the standing wave in the real object test bandwidth is less than 2, the gain is greater than 2dB, and the simulation result is consistent. The utility model discloses an antenna has wide, two circular polarization, one-way radiation, light in weight, advantage such as with low costs of bandwidth, can satisfy engineering application requirement.
3. The utility model provides a feed network comprises coupler and two balancers, and the switching of levogyration and dextrorotation polarization is realized to the coupler, as the balun of balancer, with coupler and antenna connection, reaches the balance in the bandwidth.
Drawings
Fig. 1 is a schematic structural diagram of a conical four-arm sinusoidal navigation jamming antenna of the present invention (a first dielectric plate is not shown);
FIG. 2 is a schematic diagram of a feed network in a conical four-arm sinusoidal navigation jamming antenna of the present invention;
FIG. 3 is a top view of the four-arm sine antenna body of the conical four-arm sine navigation jamming antenna of the present invention;
fig. 4 is a diagram of a simulation result of an antenna when no balun is added to a feed network;
fig. 5 is a simulation result diagram of the antenna after balun is added to the feeder network of the present invention;
fig. 6 is a standing wave simulation diagram of the antenna after balun is added to the feeder network of the present invention;
fig. 7 is a gain curve graph of the frequency band of the center feed network after adding balun according to the present invention;
FIG. 8 is a return loss test chart of the cone-shaped four-arm sinusoidal navigation jamming antenna physical simulation test of the present invention;
FIG. 9 is a standing wave ratio test chart of the cone-shaped four-arm sinusoidal navigation interference antenna physical simulation test of the present invention;
FIG. 10 is a graph showing the variation of gain and frequency of the conical quadrifilar sinusoidal navigation jamming antenna of the present invention in a microwave anechoic chamber;
the antenna comprises a metal connecting wire 1, a second dielectric plate 2, a four-arm sine antenna body 3, a sine arm 4, a coupler 5 and a balancer 6.
Detailed Description
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 not limitations of the present invention.
The sinusoidal antenna belongs to a non-frequency-varying antenna, has a wide bandwidth characteristic and is obtained by appropriately rotating a basic sinusoidal curve. And respectively rotating the sine curve counterclockwise and clockwise by a certain angle to obtain a sine arm. The four-arm sine antenna is composed of four sine arms, every two sine arms are arranged oppositely, and every two adjacent sine arms are arranged in an inserting mode.
In order to satisfy navigation's anti-interference test, the utility model provides a can cover all navigation frequency channels, and can satisfy levogyration circular polarization and dextrorotation circular polarization's antenna simultaneously. As shown in fig. 1 and fig. 3, a conical four-arm sinusoidal navigation jamming antenna comprises a first dielectric plate and a second dielectric plate 2. The first medium plate is a hollow circular truncated cone-shaped plate with openings at two ends, the second medium plate 2 is a circular plate, and the second medium plate 2 is connected to the bottom of the first medium plate and encloses a circular truncated cone-shaped space together with the first medium plate. Two connectors are arranged on the second dielectric plate 2 and are fixed at the bottom of the second dielectric plate 2, and the connecting ends of the connectors penetrate through the second dielectric plate 2. The outer surface of the first dielectric plate is provided with a four-arm sine antenna body 3, and a feed network is embedded in the first dielectric plate.
As shown in fig. 2, the feeding network includes a coupler 5, two balancers 6 and two metal connecting lines 1, the balancers are baluns, the input end of the coupler 5 is connected to the two connectors, the two output ends of the coupler 5 are connected to the input ends of the two balancers 6, the two metal connecting lines 1 are connected to the output ends of the two balancers 6, two ends of each metal connecting line 1 are connected to two opposite sinusoidal arms 4, and the two metal connecting lines 1 are located at the top opening of the first dielectric slab. Simulation analysis is performed in Ansoft HFSS software, two output ports of the coupler 5 have a phase difference of 90 degrees in a feed network located inside a first dielectric slab, left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP) can be realized by changing input, and two baluns are respectively connected to the output ports of the coupler 5 to realize balance in antenna bandwidth.
The coaxial impedance of antenna generally is 50 omega, and sinusoidal antenna also need satisfy this requirement equally to two sinusoidal arms 4 that set up relatively are a set of, require two sets of sinusoidal arms 4 constant amplitude, opposition, and two sinusoidal arms 4 that set up relatively are equivalent to a dipole, so need add the balun in order to reach the equilibrium between coupler 5 and four-arm sinusoidal antenna body 3, as a preferred scheme, the utility model discloses a broadband gradual change balun.
As shown in fig. 4 and fig. 5, which are simulation result diagrams of the antenna without adding the balun and after adding the balun, it can be seen from the simulation results that the working bandwidth of the antenna is wider, the in-band resonance tends to be stable, and the in-band return loss is less than-10 dB. Fig. 6 is a graph showing the simulation of standing waves of the antenna after adding the balun, and the standing waves are all less than 1.8 in the bandwidth. FIG. 7 is a graph showing the gain with frequency in the frequency band after adding balun, and it can be seen from FIG. 7 that the normal gain is not less than 2dBic. As can be seen from FIGS. 5 to 7, the antenna with the balun added has S (1, 1) less than-10 dB, standing wave less than 1.8 and normal gain not less than 2dBic within the bandwidth of 1-3GHz, and meets the expected design target.
The utility model discloses in, first dielectric plate adopts the FR4 board that dielectric constant is 4.4, and the cost is cheap and weight is lighter. Additionally, it is still right the utility model provides an antenna material object has carried out the simulation test, obtains the return loss test chart that fig. 8 is shown and the standing-wave ratio test result that fig. 9 is shown, material object test, return loss in the antenna bandwidth also all is less than-10 dB, and the standing wave all is less than 2.2.
The antenna real object frame of the present invention is installed in a microwave dark room simulating far field for testing, and the gain and frequency variation curve obtained by the test is shown in fig. 10.
The axial ratios of three frequency points of 1GHz, 1.5GHz and 3GHz are selected for testing, and the obtained test results are shown in table 1:
TABLE 1 axial ratio test results table
| Freq(GHz) | 1.0 | 1.5 | 3.0 |
| Measured right-hand axial ratio/dB | 2.70 | 2.12 | 2.85 |
| Actually measured left-hand axial ratio/dB | 2.65 | 1.93 | 2.82 |
According to the test result of the antenna material object, S (1, 1) is less than-10 dB in bandwidth, standing wave is less than 2, normal gain obtained by the test is about 2dB lower than a simulation result, the test and the simulation result have consistency, actual use requirements are met, and normal satellite communication positioning and anti-interference test of a satellite navigation system can be met.
The above-mentioned only be the embodiment of the present invention, not to the restriction of the protection scope of the present invention, all utilize the equivalent structure transform made in the content of the specification and the attached drawings, or directly or indirectly use in other related technical fields, all included in the patent protection scope of the present invention.
Claims (6)
1. A conical four-arm sine navigation interference antenna is characterized in that: comprises a first dielectric plate and a second dielectric plate (2);
the first medium plate is a hollow circular truncated cone-shaped plate with openings at two ends, and the second medium plate (2) is a circular plate; the second medium plate (2) is connected to the bottom of the first medium plate and encloses a circular truncated cone-shaped space together with the first medium plate;
two connectors are arranged on the second dielectric plate (2);
a four-arm sine antenna body (3) is arranged on the outer surface of the first dielectric plate, and a feed network is embedded in the first dielectric plate;
the input end of the feed network is respectively connected with two connectors, and the two output ends of the feed network are respectively and simultaneously connected with two sine arms (4) which are oppositely arranged in the four-arm sine antenna body (3).
2. The tapered quadrifilar sinusoidal navigation jamming antenna of claim 1, wherein: the feed network comprises a coupler (5) and two balancers (6);
the input ends of the couplers (5) are respectively connected with the two connectors, the two output ends of the couplers are respectively connected with the input ends of the two balancers (6), and the output ends of the two balancers (6) are respectively and simultaneously connected with two sine arms (4) which are oppositely arranged in the four-arm sine antenna body (3);
the two outputs of the coupler (5) have a phase difference of 90 °.
3. The tapered quadrifilar sinusoidal navigation jamming antenna of claim 2, wherein: the balancer (6) is a balun.
4. The tapered quadrifilar sinusoidal navigation jamming antenna of claim 3, wherein: the balun is a broadband gradual change balun.
5. The tapered quadrifilar sinusoidal navigation jamming antenna of claim 4, wherein: the feed network further comprises two metal connecting lines (1);
the two metal connecting lines (1) are respectively connected with the output ends of the two balancers (6), and two ends of each metal connecting line (1) are respectively connected with the two opposite sine arms (4).
6. The tapered quadrifilar sinusoidal navigation jamming antenna according to any one of claims 1 to 5, wherein: the first dielectric plate is an FR4 plate with a dielectric constant of 4.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220621460.6U CN217544917U (en) | 2022-03-21 | 2022-03-21 | Conical four-arm sine navigation interference antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220621460.6U CN217544917U (en) | 2022-03-21 | 2022-03-21 | Conical four-arm sine navigation interference antenna |
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| Publication Number | Publication Date |
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| CN217544917U true CN217544917U (en) | 2022-10-04 |
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| CN202220621460.6U Active CN217544917U (en) | 2022-03-21 | 2022-03-21 | Conical four-arm sine navigation interference antenna |
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