Coplanar waveguide ultra-broadband antenna with notched characteristic

Abstract

The invention discloses a coplanar waveguide ultra-broadband antenna with the notched characteristic. In composition, the coplanar waveguide ultra-broadband antenna comprises a dielectric substrate (1), a radiation unit (2), a coplanar waveguide signal feeding strip line (3) and a coplanar waveguide ground plane (4); an open-loop resonator structure (5) is embedded on the coplanar waveguide signal feeding strip line; the radiation unit, the coplanar waveguide signal feeding strip line and the coplanar waveguide ground plane are printed on the upper surface of the dielectric substrate; the radiation unit is positioned at the middle part of the dielectric substrate; the coplanar waveguide signal feeding strip line is led to the radiation unit from the edge of the dielectric substrate and is connected with the radiation unit; the coplanar waveguide ground plane is formed by two pieces of trapezoidal-like metal; the two pieces of trapezoidal-like metal are respectively and fixedly arranged at both sides of the coplanar waveguide signal feeding strip line and gaps are reserved between the two pieces of trapezoidal-like metal and the strip line; the open-loop resonator structure is positioned on the coplanar waveguide signal feeding strip line. The coplanar waveguide ultra-broadband antenna has a compact structure and a small size; by changing the size and the position of the open-loop resonator structure, notch frequency can be regulated; the problem of same frequency interference of an ultra-broadband communication system is solved.

Description

technical field [0001] The invention designs an antenna, in particular to a coplanar waveguide ultra-wideband antenna with notch characteristics. Background technique [0002] Since the U.S. Federal Communications Commission (FederalCommunicationsCommission) has allowed the 3.1-10.6GHz frequency band to be used commercially, UWB technology has received more widespread attention in the academic and commercial fields. The coplanar waveguide structure that does not require drilling and is easy to integrate is changing day by day, and the structure can be fabricated by photographic technology and has good polarization characteristics, so this technology has been applied to the design of ultra-wideband antennas and related microwave circuit components in the design. [0003] However, the frequency band occupied by the current ultra-wideband communication shares a part with the satellite C-band and the wireless local area network. Therefore, it is necessary to design an antenna t...

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Problems solved by technology

[0003] However, the frequency band occupied by the current ultra-wideband communication is shared with the satellite C-band and wireless local area network, so it is necessary to design an antenna that can reduce the interference to it. Designing an ultra-wideband antenna with notch characteristics has become a current research topic. hotspot

If there is no proper design to suppress harmonic resonance and spurious emission, the antenna will cause electromagnetic interference to nearby equipment, endangering the normal operation of the system itself and adjacent systems, especially causing interference to the currently used LAN system

Adding a filter is the most commonly used method to solve such problems, but it often causes a mismatch between the antenna and the microwave circuit, and even reduces the overall performance of the system. Therefore, designing a coplanar waveguide ultra-wideband antenna with notch characteristics is the solution to this problem. One of the important methods to solve the current antenna structure and process is relatively complicated

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