Four-frequency-band laminated satellite navigation antenna

Abstract

The invention discloses a four-frequency-band laminated satellite navigation antenna, which is characterized in that firstly, microstrip antennas are respectively designed for S, B3, L and B2b frequency bands, and a feed mode and a perturbation structure are optimized to improve the performance; the S and B3 frequency bands and the B2b and the L frequency band respectively form a double-layer laminated structure, wherein the short circuit point design of the B3 frequency band antenna enhances the isolation from the S frequency band. And then, a strip line feed network layer is additionally arranged below the B3 and L frequency band antennas, so that high integration and compactness of the antenna are realized. And finally, all antennas are integrated with a feed network to form a complete four-frequency-band laminated antenna, and performance testing is carried out on the complete four-frequency-band laminated antenna. The antenna is compact and light in structure, excellent in performance of each frequency band, capable of working at the same time, high in isolation degree and particularly suitable for occasions with limited space and high performance requirements such as airborne satellite navigation, and the performance and reliability of the antenna are manifested.

Description

Technical Field

[0001] The patent of this invention belongs to the field of navigation communication equipment, and specifically relates to a 4-band laminated satellite navigation antenna. Background Art

[0002] As a wireless positioning system, the satellite navigation system can provide high-precision navigation, positioning, short message communication, timing and other services. It is an indispensable information infrastructure in national defense applications. my country's Beidou satellite navigation system is a brand-new global satellite navigation system independently designed and developed after the United States, Russia and the European Union. Providing a variety of business guarantees for various military and civilian uses is of great significance to improving my country's national defense modernization. The satellite navigation antenna, as the wireless signal input end of the satellite navigation system, plays a vital role in the performance of the satellite navigation system and is the key to ensuring the stable operation of the equipment.

[0003] Planar microstrip antennas have the characteristics of small size, light weight, low cost, simple processing, and easy to achieve circular polarization. Circularly polarized antennas can suppress interference from external waves, reduce multipath propagation effects, and eliminate polarization distortion. They are widely used in satellite navigation antennas. Satellite navigation systems are compatible with many frequency bands. It is difficult to meet the requirements of compatibility with multiple frequency points using only a single-layer antenna design. It is difficult to achieve the miniaturization of satellite navigation antennas using multiple single-layer antennas. In recent years, research on planar microstrip antennas has mainly focused on two hotspots: ultra-wideband and multi-frequency antennas, and multi-frequency antennas are more suitable for satellite navigation antennas. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention designs a 4-band laminated satellite navigation antenna, which has the characteristics of compatibility with multiple frequency points and shared reception and transmission. It can receive B2b band (1207.14MHz±10.23M), B3 band (1268.52MHz±10.23MHz), S band (2491.75MHz±8.16MHz) signals, and can transmit L band (1615.68MHz±8.16MHz) signals to achieve compatibility with shared reception and transmission of four bands, namely S, B3, B2b and L. In addition, it adopts a three-layer laminated structure, has small size and light weight, is conducive to miniaturized design, and meets the size and weight requirements of airborne satellite navigation equipment.

[0005] The present application provides a 4-band laminated satellite navigation antenna, comprising: S101, construct an S-band receiving antenna and set a feeding point for receiving signals at the center of the antenna; S102, designing the B3 band antenna as a receiving antenna so as to form a double-layer stacked structure with the S band antenna; S103, designing an L-band transmitting antenna using a single-point feeding method; S104, constructing a receiving antenna with a dual-point feeding mode in the B2b frequency band.

[0006] Preferably, the S101 includes: Design the S-band antenna 1 as a receiving antenna, and set a feeding point in the center of the antenna; Design a U-shaped slot to extend the current path, and design a protruding rectangle on each of the four sides of the radiation patch as a perturbation; The impedance matching degree and standing wave ratio of the S-band antenna are controlled by adjusting the size of the perturbation; Two cut angles 1 are set on a diagonal line of the antenna to form right-hand circular polarization; Adjusting the size of angle cut 1 controls the axial ratio of the S-band antenna.

[0007] Preferably, the S102 includes: Band antenna 2 is a receiving antenna, forming a double-layer stacked structure with the S-band antenna; A dual-point feeding method is adopted, where the feeding amplitudes of feeding point 1 and feeding point 2 are the same, and the phase of feeding point 2 leads the phase of feeding point 1 by 90°, forming right-hand circular polarization; Set a circle of short-circuit points in the center of the B3 band antenna; Design three protruding rectangular perturbations on the four sides of the radiation patch; The size of the rectangular perturbation is adjusted to control the impedance matching degree and standing wave ratio of the B3 frequency band antenna 2.

[0008] Preferably, the S103 includes: The L-band antenna 3 is designed as a transmitting antenna using a single-point feeding method; Two cut corners 2 are set on a diagonal line of the antenna to form left-hand circular polarization; The size of the cut corner 2 controls the axial ratio of the L-band antenna.

[0009] Preferably, the S104 includes: The B2b band antenna 4 is designed as a receiving antenna using a dual-point feeding method; The feeding amplitudes of feed point 1 and feed point 2 are the same, and the phase of feed point 2 leads the phase of feed point 1 by 90°, forming right-hand circular polarization; Design a square slot to extend the current path, and design two protruding rectangles on the four sides of the radiation patch as perturbations; The impedance matching degree and standing wave ratio of the B2b band antenna are controlled by adjusting the size of the perturbation.

[0010] Preferably, the S104 includes: S201, connecting the feeder line of the S-band antenna 1 to the feeding point of the S-band antenna to provide power for the S-band antenna; S202, using Wilkinson power divider 1 to divide the feeder power of the B3 frequency band antenna into two paths; S203, using Wilkinson power divider 2 to divide the feeder power of the B2b frequency band antenna into two paths; S204, connecting the feed line of the L-band antenna to the feeding point of the L-band antenna to provide power for the L-band antenna.

[0011] Preferably, the step S202 of dividing the feeder power of the B3 frequency band antenna into two paths includes: The left side goes all the way through the 90° phase shift network 1 to the feed point 2 of the B3 band antenna; Go all the way to the right and directly reach the feed point 1; The two feeding points differ in phase by 90 degrees, making the B3 band antenna right-hand circularly polarized.

[0012] Preferably, in S203, the feeder power of the B2b frequency band antenna is divided into two paths, including: The left side passes through the 90° phase shift network 2 to the feed point 2 of the B2b band antenna; Go all the way to the right and directly reach the feed point 1; The two feeding points differ in phase by 90 degrees, making the B2b band antenna right-hand circularly polarized.

[0013] Preferably, it also includes: S301 determines that the S-band antenna and the B3-band antenna are a double-layer stacked structure, with the S-band antenna located at the upper layer and the B3-band antenna located at the lower layer; S302, determining that the B2b band antenna and the L band antenna are a double-layer stacked structure, the B2b band antenna is located at the lower layer, and the L band antenna is located at the upper layer; S303, a double-layer stacked structure consisting of an S-band antenna and a B3-band antenna and a B2b-band antenna and an L-band antenna S304, with the stripline feed network layer located in the third layer of the stack, i.e., the lower layer of the B3-band antenna and the L-band antenna; S305, assembling antennas of each frequency band and a stripline feed network layer according to the structure to form a complete 4-band laminated satellite navigation antenna; S306, the assembled antenna will be subjected to performance testing, including gain, radiation pattern, and isolation of the antenna in each frequency band.

[0014] Preferably, the The S-band antenna is a microstrip antenna with right-hand circular polarization and single-point feeding, and can receive 2491.75MHz±8.16MHz signals. The B3 band antenna is a microstrip antenna with right-hand circular polarization and dual-point feeding, and can receive 1268.52MHz±10.23MHz signals. The B2b band antenna is a microstrip antenna with right-hand circular polarization and dual-point feeding, and can receive 1207.14MHz±10.23MHz signals. The L-band antenna is a microstrip antenna with left-hand circular polarization and single-point feeding, transmitting 1615.68MHz±8.16MHz signals.

[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. Through the carefully designed laminated antenna structure, the multi-band reception and transmission functions of the S band, B3 band, L band and B2b band are realized, which effectively improves the performance of the antenna. Each band antenna adopts a specific feeding method and perturbation structure to optimize impedance matching, improve the standing wave ratio, and achieve good circular polarization characteristics. In particular, the short-circuit point set in the B3 band antenna effectively improves the isolation between the S band antenna, reduces mutual interference between frequency bands, and ensures stable reception and transmission of signals. In addition, the antennas of each band have achieved fine control of antenna performance by adjusting parameters such as perturbation size and cutting angle size to meet the needs of different application scenarios.

[0016] 2. The laminated antenna structure not only realizes the simultaneous operation of multiple frequency bands, but also maintains a small size and weight, making it easy to install and carry. The construction of the stripline feed network layer makes the antenna system more compact and more integrated, improving the overall reliability and stability. At the same time, the solution is also verified by simulation to ensure that the key performance indicators of the antenna gain, in-band flatness, and phase center stability of each frequency band meet or exceed the expected goals, providing a strong technical guarantee for practical applications.

[0017] 3. The antenna feeding scheme in the embodiment of the present application successfully realizes the effective feeding of the four frequency band antennas of S, B3, B2b, and L by accurately controlling the feeding points and power distribution of the antennas of each frequency band. In particular, for the B3 and B2b frequency band antennas, a Wilkinson power divider combined with a 90° phase shift network is used to cleverly achieve a 90-degree phase difference between the two feeding points, thereby ensuring the right-hand circular polarization characteristics of the antenna and significantly improving the stability and efficiency of signal transmission. This feeding scheme is not only cleverly designed, but also easy to implement, effectively avoiding signal loss and interference problems caused by complex feeding networks. At the same time, the independent setting of the feeding points of the antennas in each frequency band is also convenient for the subsequent debugging and optimization of antenna performance.

[0018] 4. The 4-band laminated satellite navigation antenna in the embodiment of the present application successfully achieves coverage of the four frequency bands of S, B3, B2b, and L through design and assembly, and adopts a three-layer laminated structure, which significantly reduces the size and weight of the antenna, and is very suitable for airborne satellite navigation equipment and other scenarios with strict space restrictions. The antenna system adopts a microstrip antenna design, combined with different polarization modes and feeding technologies, to ensure high isolation between the various frequency bands and stability of signal transmission. In the actual performance test, the antenna was comprehensively modeled and simulated using Ansys electromagnetic field simulation software. The results showed that the antenna system exhibited excellent gain, in-band flatness, and phase center stability in each frequency band, fully demonstrating its excellent performance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a process of a 4-band laminated satellite navigation antenna according to an embodiment of the present invention; Figure 2 A top view of an S-band antenna according to an embodiment of the present invention; Figure 3 A top view of a B3 frequency band antenna according to an embodiment of the present invention; Figure 4 is a top view of an L-band antenna according to an embodiment of the present invention; Figure 5 A top view of a B2b frequency band antenna according to an embodiment of the present invention; Figure 6 A top view of a stripline feed network layer according to an embodiment of the present invention; Figure 7 It is a schematic side view of a 4-band laminated satellite navigation antenna according to an embodiment of the present invention; Figure 8 The figure shows the antenna performance in various frequency bands of Ansys electromagnetic field simulation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings.

[0021] Embodiment 1: like Figure 1 As shown, a 4-band laminated satellite navigation antenna includes: constructing an S-band antenna 1, a B3-band antenna 2, an L-band antenna 3, a B2b-band antenna 4, and a stripline feed network layer 5. The specific implementation steps are: S101, construct an S-band receiving antenna and set a feeding point for receiving signals at the center of the antenna.

[0022] Specifically, if Figure 2As shown, a top view of the S-band antenna 1 is shown. The S-band antenna 1 is a receiving antenna, and the center of the antenna is a feeding point. The U-shaped groove can extend the current path and reduce the size of the radiation patch. The four sides of the radiation patch each have a protruding rectangle, which is a perturbation. Adjusting the size of the perturbation can improve the impedance matching of the S-band antenna 1 and improve the standing wave ratio. The two cut corners 1 are located at both ends of a diagonal line. Right-hand circular polarization can be formed by cutting the corners 1. The axial ratio of the S-band antenna 1 can be adjusted by adjusting the size of the cut corner 1.

[0023] S102, design the B3 band antenna as a receiving antenna so as to form a double-layer stacked structure with the S band antenna.

[0024] Specifically, if Figure 3 As shown, a top view of the B3 band antenna 2 is shown. The B3 band antenna 2 is a receiving antenna and adopts dual-point feeding. The feeding amplitudes of feeding point 1 and feeding point 2 are the same, and the phase of feeding point 2 is 90° ahead of that of feeding point 1 to form right-hand circular polarization. Since the B3 band antenna 2 and the S band antenna 1 are double-layer stacked structures, the feeding points of the S band antenna 1 and the B3 band antenna 2 are close, and the isolation between the feeding points is poor. Therefore, a circle of short-circuit points is set in the center of the B3 band antenna 2 to improve the isolation between the B3 band antenna 2 and the S band antenna 1. There are three protruding rectangular perturbations on the four sides of the radiation patch to extend the current path and reduce the size of the radiation patch. By adjusting the size of the rectangular perturbation, the impedance matching degree of the B3 band antenna 2 can be improved and the standing wave ratio can be improved.

[0025] S103, design an L-band transmitting antenna using a single-point feeding method.

[0026] Specifically, if Figure 4 As shown, a top view of the L-band antenna 3 is shown. The L-band antenna 3 is a transmitting antenna and adopts single-point feeding. The impedance matching degree of the L-band antenna 3 can be improved by adjusting the position of the feeding point, and the standing wave ratio can be improved. The two cut corners 2 are located at both ends of a diagonal line. Left-hand circular polarization can be formed by cutting the corners 2. The axial ratio of the L-band antenna 4 can be adjusted by adjusting the size of the cut corners 2.

[0027] S104, constructing a receiving antenna with a dual-point feeding mode in the B2b frequency band.

[0028] Specifically, if Figure 5 As shown, a top view of the B2b band antenna 4 is shown. The B2b band antenna 4 is a receiving antenna and adopts dual-point feeding. The feeding amplitudes of feed point 1 and feed point 2 are the same, and the phase of feed point 2 leads the phase of feed point 1 by 90°, forming right-hand circular polarization. The square slot can extend the current path and reduce the size of the radiation patch. There are two protruding rectangles on the four sides of the radiation patch, which are perturbations. Adjusting the size of the perturbation can improve the impedance matching of the B2b band antenna 4 and improve the standing wave ratio.

[0029] S105, stacking the above four-band antenna and the stripline feed network layer to form a three-layer stacked structure.

[0030] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: 1. Through the carefully designed laminated antenna structure, the multi-band reception and transmission functions of the S band, B3 band, L band and B2b band are realized, which effectively improves the performance of the antenna. Each band antenna adopts a specific feeding method and perturbation structure to optimize impedance matching, improve the standing wave ratio, and achieve good circular polarization characteristics. In particular, the short-circuit point set in the B3 band antenna effectively improves the isolation between the S band antenna, reduces mutual interference between frequency bands, and ensures stable reception and transmission of signals. In addition, the antennas of each band have achieved fine control of antenna performance by adjusting parameters such as perturbation size and cutting angle size to meet the needs of different application scenarios.

[0031] 2. The laminated antenna structure not only realizes the simultaneous operation of multiple frequency bands, but also maintains a small size and weight, making it easy to install and carry. The construction of the stripline feed network layer makes the antenna system more compact and more integrated, improving the overall reliability and stability. At the same time, the solution is also verified by simulation to ensure that the key performance indicators of the antenna gain, in-band flatness, and phase center stability of each frequency band meet or exceed the expected goals, providing a strong technical guarantee for practical applications.

[0032] Embodiment 2: The above-mentioned embodiment 1 realizes efficient integration and performance improvement of multiple bands including S band, B3 band, L band and B2b band through innovative laminated antenna design and optimization method. In step S105, the stripline feed network layer, such as Figure 6 As shown, a top view of the stripline feed network layer specifically includes: S201, connecting the feeder line of the S-band antenna 1 to the feeding point of the S-band antenna to provide power for the S-band antenna.

[0033] S202, use Wilkinson power divider 1 to divide the feeder power of the B3 frequency band antenna into two paths.

[0034] Among them, the left path reaches the feeding point 2 of the B3 frequency band antenna through the 90° phase shifting network 1, and the right path directly reaches the feeding point 1, ensuring that the phase difference between the two feeding points is 90 degrees, realizing the right-hand circular polarization of the B3 frequency band antenna.

[0035] S203, using Wilkinson power divider 2 to divide the feeder power of the B2b frequency band antenna into two paths.

[0036] Among them, the left path passes through the 90° phase shift network 2 to reach the feeding point 2 of the B2b frequency band antenna, and the right path directly reaches the feeding point 1, ensuring that the phase difference between the two feeding points is 90 degrees, realizing the right-hand circular polarization of the B2b frequency band antenna.

[0037] S204, connecting the feed line of the L-band antenna to the feeding point of the L-band antenna to provide power for the L-band antenna.

[0038] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: 1. The antenna feeding scheme in the embodiment of the present application successfully realizes the effective feeding of the four frequency band antennas of S, B3, B2b, and L by accurately controlling the feeding points and power distribution of the antennas of each frequency band. In particular, for the B3 and B2b frequency band antennas, a Wilkinson power divider combined with a 90° phase shift network is used to cleverly achieve a 90-degree phase difference between the two feeding points, thereby ensuring the right-hand circular polarization characteristics of the antenna and significantly improving the stability and efficiency of signal transmission. This feeding scheme is not only cleverly designed, but also easy to implement, effectively avoiding signal loss and interference problems caused by complex feeding networks. At the same time, the independent setting of the feeding points of the antennas in each frequency band is also convenient for the subsequent debugging and optimization of antenna performance.

[0039] Embodiment three: In the antenna feeding scheme of the second embodiment, the Wilkinson power divider and the 90° phase shift network accurately control the power and phase of the feeding point, realizing effective and stable feeding of the S, B3, B2b, and L four-band antennas, especially ensuring the right-hand circular polarization characteristics of the B3 and B2b band antennas, improving the signal transmission efficiency, and the scheme design is ingenious and practical. The S, B3, B2b, and L four-band antennas are superimposed with the stripline feeding network layer to reduce the size and weight of the antenna, such as Figure 7 As shown, the side view schematic diagram of the 4-band laminated satellite navigation antenna further supplements the second embodiment, specifically: S301 determines that the S-band antenna and the B3-band antenna are a double-layer stacked structure, with the S-band antenna located at the upper layer and the B3-band antenna located at the lower layer.

[0040] Among them, the S-band antenna is a microstrip antenna with right-hand circular polarization and single-point feeding, which is used to receive 2491.75MHz±8.16MHz signals; the B3-band antenna is a microstrip antenna with right-hand circular polarization and dual-point feeding, which is used to receive 1268.52MHz±10.23MHz signals.

[0041] S302, determining that the B2b band antenna and the L band antenna are a double-layer stacked structure, the B2b band antenna is located at the lower layer, and the L band antenna is located at the upper layer.

[0042] Among them, the B2b band antenna is a microstrip antenna with right-hand circular polarization and dual-point feeding, which is used to receive 1207.14MHz±10.23MHz signals; the L band antenna is a microstrip antenna with left-hand circular polarization and single-point feeding, which is used to transmit 1615.68MHz±8.16MHz signals.

[0043] S303, a double-layer stacked structure consisting of an S-band antenna and a B3-band antenna and a double-layer stacked structure consisting of a B2b-band antenna and an L-band antenna are arranged side by side.

[0044] Among them, the lower surfaces of the B3 band antenna and the B2b band antenna are at the same height.

[0045] S304, the stripline feed network layer is located in the third layer of the stack, that is, the lower layer of the B3 band antenna and the L band antenna.

[0046] Among them, the stripline feeding network is used to feed the S-band antenna, the B3-band antenna, the B2b-band antenna, and the L-band antenna.

[0047] S305, assembling antennas of various frequency bands and stripline feed network layers according to the structure to form a complete 4-band laminated satellite navigation antenna.

[0048] S306, the assembled antenna will be subjected to performance testing, including gain, radiation pattern, and isolation of the antenna in each frequency band.

[0049] Specifically, the 4-band laminated satellite navigation antenna was modeled and simulated using Ansys electromagnetic field simulation software. The gain, in-band flatness, and phase center stability of the antenna in each frequency band were simulated, and the antenna performance display diagrams for each frequency band were obtained as shown below. Figure 8 shown.

[0050] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: 1. The 4-band laminated satellite navigation antenna in the embodiment of the present application has successfully achieved coverage of the four frequency bands of S, B3, B2b, and L through design and assembly, and adopts a three-layer laminated structure, which significantly reduces the size and weight of the antenna. It is very suitable for airborne satellite navigation equipment and other scenarios with strict space restrictions. The antenna system adopts a microstrip antenna design, combined with different polarization modes and feeding technologies, to ensure high isolation between each frequency band and stability of signal transmission. In the actual performance test, the antenna was comprehensively modeled and simulated using Ansys electromagnetic field simulation software. The results showed that the antenna system exhibited excellent gain, in-band flatness, and phase center stability in each frequency band, fully demonstrating its excellent performance and reliability.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A 4-band laminated satellite navigation antenna, characterized in that: include: S101, construct an S-band receiving antenna and set a feeding point for receiving signals at the center of the antenna; S102, designing the B3 band antenna as a receiving antenna so as to form a double-layer stacked structure with the S band antenna; S103, designing an L-band transmitting antenna using a single-point feeding method; S104, constructing a receiving antenna with a dual-point feeding mode in the B2b frequency band.

2. A quad-band laminated satellite navigation antenna as claimed in claim 1, characterized in that: The S101 includes: Design the S-band antenna as a receiving antenna and set a feeding point in the center of the antenna; Design a U-shaped slot to extend the current path, and design a protruding rectangle on each of the four sides of the radiation patch as a perturbation; The impedance matching degree and standing wave ratio of the S-band antenna are controlled by adjusting the size of the perturbation; Two cut angles 1 are set on a diagonal line of the antenna to form right-hand circular polarization; Adjusting the size of angle cut 1 controls the axial ratio of the S-band antenna.

3. The quad-band laminated satellite navigation antenna according to claim 1, characterized in that: The S102 includes: The B3 band antenna is a receiving antenna, forming a double-layer stacked structure with the S band antenna; A dual-point feeding method is adopted, where the feeding amplitudes of feeding point 1 and feeding point 2 are the same, and the phase of feeding point 2 leads the phase of feeding point 1 by 90°, forming right-hand circular polarization; Set a circle of short-circuit points in the center of the B3 band antenna; Design three protruding rectangular perturbations on the four sides of the radiation patch; The size of the rectangular perturbation is adjusted to control the impedance matching degree and standing wave ratio of the B3 frequency band antenna 2.

4. A quad-band laminated satellite navigation antenna as claimed in claim 3, characterized in that: The S103 includes: The L-band antenna 3 is designed as a transmitting antenna using a single-point feeding method; Two cut corners 2 are set on a diagonal line of the antenna to form left-hand circular polarization; The size of the cut corner 2 controls the axial ratio of the L-band antenna.

5. The quad-band laminated satellite navigation antenna according to claim 1, characterized in that: The S104 includes: The B2b band antenna 4 is designed as a receiving antenna using a dual-point feeding method; The feeding amplitudes of feed point 1 and feed point 2 are the same, and the phase of feed point 2 leads the phase of feed point 1 by 90°, forming right-hand circular polarization; Design a square slot to extend the current path, and design two protruding rectangles on the four sides of the radiation patch as perturbations; The impedance matching degree and standing wave ratio of the B2b band antenna are controlled by adjusting the size of the perturbation.

6. The quad-band laminated satellite navigation antenna according to claim 1, characterized in that: The S104 includes: S201, connecting the feeder line of the S-band antenna 1 to the feeding point of the S-band antenna to provide power for the S-band antenna; S202, using Wilkinson power divider 1 to divide the feeder power of the B3 frequency band antenna into two paths; S203, using Wilkinson power divider 2 to divide the feeder power of the B2b frequency band antenna into two paths; S204, connecting the feed line of the L-band antenna to the feeding point of the L-band antenna to provide power for the L-band antenna.

7. A quad-band laminated satellite navigation antenna as claimed in claim 6, characterized in that: The step S202, dividing the feeder power of the B3 frequency band antenna into two paths, includes: The left side goes all the way through the 90° phase shift network 1 to the feed point 2 of the B3 band antenna; Go all the way to the right and directly reach the feed point 1; The two feeding points differ in phase by 90 degrees, making the B3 band antenna right-hand circularly polarized.

8. The quad-band laminated satellite navigation antenna according to claim 6, characterized in that: In S203, the feeder power of the B2b frequency band antenna is divided into two paths, including: The left side passes through the 90° phase shift network 2 to the feed point 2 of the B2b band antenna; Go all the way to the right and directly reach the feed point 1; The two feeding points differ in phase by 90 degrees, making the B2b band antenna right-hand circularly polarized.

9. The quad-band laminated satellite navigation antenna according to claim 6, characterized in that: Also includes: S301 determines that the S-band antenna and the B3-band antenna are a double-layer stacked structure, with the S-band antenna located on the upper layer and the B3-band antenna located on the lower layer; S302, determining that the B2b band antenna and the L band antenna are a double-layer stacked structure, the B2b band antenna is located at the lower layer, and the L band antenna is located at the upper layer; S303, a double-layer stacked structure consisting of an S-band antenna and a B3-band antenna and a B2b-band antenna and an L-band antenna S304, with the stripline feed network layer located in the third layer of the stack, i.e., the lower layer of the B3-band antenna and the L-band antenna; S305, assembling antennas of various frequency bands and stripline feed network layers according to the structure to form a complete 4-band laminated satellite navigation antenna; S306, the assembled antenna will be subjected to performance testing, including gain, radiation pattern, and isolation of the antenna in each frequency band.

10. The quad-band laminated satellite navigation antenna according to claim 8, characterized in that: Said The S-band antenna is a microstrip antenna with right-hand circular polarization and single-point feeding, and can receive 2491.75MHz±8.16MHz signals. The B3 band antenna is a microstrip antenna with right-hand circular polarization and dual-point feeding, and can receive 1268.52MHz±10.23MHz signals. The B2b band antenna is a microstrip antenna with right-hand circular polarization and dual-point feeding, and can receive 1207.14MHz±10.23MHz signals. The L-band antenna is a microstrip antenna with left-hand circular polarization and single-point feeding, transmitting 1615.68MHz±8.16MHz signals.

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