BD B1 frequency band satellite navigation terminal antenna and working method thereof

Abstract

The invention relates to a BD B1 frequency band satellite navigation terminal antenna and a working method thereof. The antenna comprises a radiation plate and a reflection plate, wherein the centralparts of the radiation plate and the reflection plate are connected with a coaxial line, an upper radiation arm group connected with the inner center of the coaxial line is arranged on the upper sidesurface of the radiation plate, the lower side surface of the radiation plate is provided with a lower radiation arm group staggered 180 DEG with the upper radiation arm group and connected with the outer center of the coaxial line, the upper radiation arm group comprises two upper radiation arms staggered 90 DEG and connected with each other through one inward ends, the lower radiation arm groupcomprises two lower radiation arms staggered 90 DEG and connected with each other through one inward ends, four vertical metal columns distributed in a rectangular shape are further connected betweenthe radiation plate and the reflection plate, and radiation patches corresponding to the vertical metal columns in position in an up-down one-to-one mode are arranged on the lower side surface of theradiation plate. According to the antenna, a coaxial line feeding method is adopted, the upper layer is connected with the inner center of the coaxial line, the lower layer is connected with the outercenter of the coaxial line, a 90-DEG phase difference is generated, the circularly polarized radiation is achieved, the coupling effect is achieved through the short-circuit patch and the radiation arm, and the bandwidth of the antenna can be increased.

Description

technical field [0001] The invention relates to a BD B1 frequency band satellite navigation terminal antenna and a working method thereof, belonging to the technical field of wireless communication. Background technique [0002] Circularly polarized (CP) antennas are highly favored by certain wireless communication systems, such as global positioning systems, satellite communication / navigation systems, and radio frequency identification systems, due to their ability to mitigate polarization mismatch and suppress multipath interference. Designing two electric field components with equal amplitude and quadrature phase is a common technique to implement CP antennas. CP antennas can be divided into single-fed and double-fed according to the feeding method. Generally, single-fed antennas have simpler feed networks but narrower axial ratio (AR) bandwidth, while double-fed antennas can provide wider AR bandwidth but require external hybrid couplers or power dividers, which Will in...

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Problems solved by technology

However, more energy needs to be lost to bring modes with similar radiation characteristics close to each other, and there are usually special constraints on the size or shape of the antenna

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