Long sleeve shirt type opening tuning ring low elevation angle high gain big dipper multifrequency microstrip antenna
A technology of microstrip antennas and tuning loops, applied to antennas, antennas suitable for movable objects, and devices that enable antennas to work in different bands at the same time, can solve the problems of few successful examples of microstrip antennas, and achieve Improve low elevation gain, achieve impedance matching, and widen the effect of impedance bandwidth
Active Publication Date: 2015-12-16
XIAMEN UNIV
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Problems solved by technology
[0006] In recent years, although there have been many research results on multi-frequency microstrip antennas applied to satellite navigation systems, they mainly focus on dual-frequency antennas, which are compatible with the three frequency bands of Beidou L, S and B3 and have low elevation angle and high gain characteristics. There are few successful examples of microstrip antennas
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[0033] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0034] see Figure 1~4 , the embodiment of the present invention consists of five parts: an upper patch, an upper dielectric substrate, a lower patch, a lower dielectric substrate, and a special-shaped metal back cavity.
[0035] The upper dielectric substrates are all made of high-performance dielectric substrate materials, with a relative dielectric constant of 3-9, typically 6.15±5%. The radius of the upper dielectric substrate is 15.0-25.0mm, the typical value is 20.8±5%, the thickness is 2.5-3.5mm, the typical value is 3.0±5%; the radius of the lower dielectric substrate is 30.0-45.0mm, the typical value is 30.5 ±5%, the thickness is 2.5~3.5mm, and the typical value is 3.0±5%.
[0036]The outline of the upper patch structure is a circular structure with arc-shaped protrusions on the top and bottom. The radius of the circular structure is 15-25mm,...
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Abstract
Provided is a long sleeve shirt type opening tuning ring low elevation angle high gain big dipper multifrequency microstrip antenna, relating to a multifrequency microstrip antenna. The antenna is provided with an upper medium substrate, a lower medium substrate and a metal back cavity. The upper surface of the upper medium substrate is provided with an upper layer paster which is a circular radiation paster loading four long sleeve shirt type opening tuning rings which are symmetrically distributed; the top end and bottom end of the circular radiation paster are provided with arc-shaped projections which can widen antenna impedance bandwidth; T-shaped slits for leading surface current directions are arranged among the long sleeve shirt type opening tuning rings. The upper surface of the lower medium substrate is provided with a lower layer paster which is a circular paster, the left and right ends of which are both provided with arc-shaped grooves. The upper layer paster is rightward eccentrically arranged relative to the lower layer paster, thereby realizing the impedance match of single feed lamination multifrequency antennas; the metal back cavity has an inclined reflection plane, thereby increasing antenna low elevation angle gains. The antenna of the invention can greatly increase antenna low elevation angle gains, and furthermore improve system positioning precision.
Description
technical field [0001] The invention relates to a multi-frequency microstrip antenna, in particular to a long-sleeved shirt-shaped opening tuning ring low elevation angle high-gain Beidou multi-frequency microstrip antenna suitable for Beidou satellite navigation system. Background technique [0002] The Beidou satellite navigation system is a satellite navigation system that the Chinese government is developing and aims to form a global coverage capability. Its appearance and gradual improvement have greatly promoted the development of my country's satellite navigation-related industries. The National Aeronautics Administration of China launched the first Beidou first-generation satellite in 2000, and began construction of the Beidou satellite navigation system (Beidou-2) in 2007. services, and plans to form a global coverage capability in 2020. With the rapid development of science and technology, the space-time information service based on the satellite navigation system...
Claims
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Login to View More IPC IPC(8): H01Q1/38H01Q13/08H01Q5/10H01Q1/28
Inventor 周建华唐瑜宋辉辉游佰强
Owner XIAMEN UNIV