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Circularly polarized multimode wideband antenna and microstrip power division phase shift network

A broadband antenna, circular polarization technology, applied in the direction of antenna, slot antenna, radiating element structure, etc., can solve the problems of large antenna volume, narrow frequency band, limited satellite positioning antenna design, etc., to achieve excellent performance and reduce antenna thickness. , Improve the effect of circular polarization bandwidth and circular polarization purity

Inactive Publication Date: 2011-09-14
HEFEI ANDA ELECTRONICS DETECTION EQUIP FACTORY
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  • Claims
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Problems solved by technology

[0003] Due to its small size, light weight, low profile, easy processing and circuit integration and many other advantages, the microstrip antenna has become the best choice for satellite positioning and navigation antennas, but its inherent narrow frequency band, generally the bandwidth of a typical microstrip antenna is 0.7 % to about 7%, which limits the design of multi-mode satellite positioning antennas
Traditional GPS antennas are either only suitable for GPS navigation systems, or in order to be compatible with four satellite positioning navigation systems, low dielectric constant foam materials and laminated patch structures are used, and L-shaped strips are used to couple the feed structure, resulting in antenna Larger

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  • Circularly polarized multimode wideband antenna and microstrip power division phase shift network
  • Circularly polarized multimode wideband antenna and microstrip power division phase shift network
  • Circularly polarized multimode wideband antenna and microstrip power division phase shift network

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Embodiment Construction

[0021] see figure 1 , 2 , a circularly polarized multi-mode broadband antenna and a microstrip power-dividing phase-shifting network, including an antenna and a feeding network, the antenna includes a dielectric substrate 1, a rectangular radiation patch 2 is attached to the surface of the dielectric substrate 1, and the rectangular radiation patch Rectangular cracks 3 are arranged around 2, and four microstrip lines 4 extending outward are respectively arranged around the rectangular radiation patch 2; the feed network is composed of the first and second feed circuits, and the first feed circuit It is composed of cascaded power splitter and 180° broadband phase shifter. The first-level feed circuit is connected to the general port of the signal source. The second-level feed circuit includes two feed circuit units, and each feed circuit unit is composed of The power divider and the 90° broadband phase shifter are cascaded, and the second-stage feed circuit has four feed ports...

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Abstract

The invention discloses a circularly polarized multimode wideband antenna and microstrip power division phase shift network, which comprises an antenna and feed network, wherein the feed network consists of a primary feed circuit and a secondary feed circuit; the primary feed circuit consists of a power divider and a 180-degree wideband phase shifter which are concatenated, and is externally connected with a master port of a signal source; the secondary feed circuit comprises two feed circuit units; and each feed circuit consists of the power divider and a 90-degree wideband phase shifter which are concatenated. The circularly polarized multimode wideband antenna and microstrip power division phase shift network has high performance, and can be applied to four conventional satellite navigation positioning service systems; the antenna adopts radiation patch grooving to improve an impedance bandwidth, greatly reduces an antenna thickness, and has high radiation characteristics and electrical characteristics; and quadruple power division phase shift network feed is adopted so as to greatly increase a circular polarization bandwidth and circular polarization purity.

Description

technical field [0001] The invention relates to a circularly polarized multimode broadband antenna and a microstrip power division phase-shifting network. Background technique [0002] The global satellite positioning system uses satellites to provide high-quality positioning, navigation and timing services to global users. It not only has important applications in the economic field (civilian use), but also plays an irreplaceable role in national defense (military use). At present, GPS in the United States and GLONASS in Russia have been widely used, and Galileo in Europe and Compass in China have also served the society. In order to improve the positioning accuracy and solve the problem of a single system coverage gap, the future satellite positioning and navigation system must adopt a mode compatible with multiple satellite navigation systems, which will put forward new requirements for the terminal antenna. Therefore, it is necessary to study a compatible multi-mode The...

Claims

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Application Information

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IPC IPC(8): H01Q25/04H01Q13/10H01Q23/00H01Q1/38
Inventor 李民权付灿杨茂清吴昊王新王小兵杨勇俞建琪
Owner HEFEI ANDA ELECTRONICS DETECTION EQUIP FACTORY
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