UWB (ultra wide band) antenna based on U-shaped groove and L-shaped parasitic strips

Abstract

>The invention relates to the technical field of a UWB (ultra wide band) antenna, and especially relates to a UWB (ultra wide band) antenna based on a U-shaped groove and L-shaped parasitic strips. The UWB antenna comprises a medium substrate, a grounding plate, a radiation patch, a microstrip feed line, a coaxial cable and two parasitic strips; and the coaxial cable is disposed on one side of the medium substrate, the grounding plate is tightly attached to the lower surface of the medium substrate, the U-shaped groove is embedded in the radiation patch, the radiation patch is tightly attached to the upper surface of the medium substrate, the microstrip feed line is located on the upper surface of the medium substrate, one end of the microstrip feed line is connected with the radiation patch, the other end of the microstrip feed line is connected with an inner conductor of the coaxial cable, the parasitic strips are the L-shaped parasitic strips, and the two parasitic strips are disposed on the upper surface of the medium substrate and are symmetrically located on two sides of the microstrip feed line. The UWB antenna has the advantages of compact and simple structure and ease of manufacture, and achieves a good impedance characteristic and a good radiation direction characteristic in a 3-11.1GHz frequency band scope.

Description

technical field [0001] The invention relates to the technical field of ultra-wideband antennas, in particular to an ultra-wideband antenna based on U-shaped slots and L-shaped parasitic strips. Background technique [0002] Under the high requirement of bandwidth, modern communication system also requires the communication system to have high transmission speed. Ultra-wideband (UWB) technology has the advantages of high transmission rate, reasonable image analysis and high security, and has broad application prospects in many fields such as wireless communication, microwave imaging and electronic countermeasures. UWB antenna is one of the key components of UWB communication system, and its characteristics directly affect the performance of the whole system. With the approval of the U.S. Federal Communications Commission (FCC) to use 3.1-10.6GHz as a short-distance wireless communication frequency band, UWB antenna technology has attracted more and more attention. People’s d...

AI Technical Summary

Problems solved by technology

Aiming at the problem that the ultra-wideband system is susceptible to interference by narrowband signals, the present invention proposes to realize the notch in the 5.1-5.9GHz frequency band by loading a U-shaped slot on the radiation patch of the antenna, and introduce a parasitic strip on the ground plate to achieve Realize the notch in the 3.4-4GHz frequency band, realize good impedance characteristics and radiation direction characteristics in the 3-11.1GHz frequency band, and can effectively suppress the interference between WiMAX and WLAN systems

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