Double-frequency micro-strip antenna adopting multilayer structure

Abstract

The invention discloses a double-frequency micro-strip antenna adopting a multilayer structure. The double-frequency micro-strip antenna comprises upper layer micro-strip antenna bodies, a lower layer micro-strip antenna body, a feed metal micro-strip line and a feed port. The lower layer micro-strip antenna body comprises a common metal ground plane and a lower layer micro-strip antenna base plate. A large first rectangular gap and a small second rectangular gap are formed in the common metal ground plane. The feed micro-strip line is located on the reverse side of the lower layer micro-strip antenna base plate. The upper layer micro-strip antenna bodies are stacked on the common metal ground plane and conduct coupling feed through the small gap in the common metal ground plane and the feed metal micro-strip line. Radiating elements of the upper layer micro-strip antenna bodies are square metal sheets which form an inverted angle at the diagonal positions. The large gap of the lower layer micro-strip antenna body is used as the radiating element, and the lower layer micro-strip antenna body directly feeds through the feed micro-strip line. The double-frequency micro-strip antenna is small in size, simple in structure, easy to machine, capable of being used in a GPS and a WLAN at the same time, and can be easily integrated with a circuit.

Description

[0001] technical field [0002] The invention belongs to the technical field of dual-frequency microstrip antennas, and more specifically relates to a dual-frequency microstrip antenna with a multi-layer structure. Background technique [0003] In recent years, the Global Positioning System (Global Positioning System) and Wireless Local Area Networks (WLAN) technologies have developed rapidly in the civilian field, and the development of wireless technologies has also made spectrum resources increasingly tight. Therefore, the application of dual-band and multi-band antennas in modern wireless communications has attracted much attention. [0004] The antennas in the global positioning system are required to have approximately hemispherical coverage and should have circular polarization; the antennas in the wireless local area network are required to have approximately omnidirectional radiation characteristics. The existing design of dual-frequency antennas with single-port f...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a dual-frequency microstrip antenna adopting a multi-layer structure, the purpose of which is to only adopt a single-port feeding structure, but simultaneously have the characteristics of a GPS antenna (1.575GHz) and WLAN antenna (2.40~2.4835GHz), thereby solving the technical problem of complex structure caused by dual-port feeding in the prior art

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