A loop multi-notch ultra-wideband antenna

Abstract

The purpose of the present invention is to provide a ring-shaped multi-notch ultra-wideband antenna, which is characterized in that it includes a dielectric substrate, a radiation unit, a coplanar waveguide ground plane, a coplanar waveguide feed signal strip line, a radiation unit, and a coplanar waveguide ground plane. , The coplanar waveguide feed signal strip lines are all fixed on the dielectric substrate, the coplanar waveguide feed signal strip lines are arranged under the radiation unit, there are two coplanar waveguide ground planes, and they are arranged on the coplanar waveguide feed signal strip lines sides. The invention not only facilitates the integration with the microwave integrated circuit, but also realizes the compact design of the system; adopts the coplanar waveguide feeding structure, which is convenient for broadening the impedance bandwidth; The design of the filter reduces the design cost and the complexity of the system, while improving the overall performance of the system and reducing the overall volume.

Description

technical field [0001] The invention relates to a planar printed board antenna. Background technique [0002] With the rapid development of wireless communication technology, people rely more and more on wireless communication. From analog systems such as AMPS, TACS, and NMT of the first generation of mobile communication, to digital communication systems such as GSM and IS-95 of the second generation, Developed to the present MT-2000, UMTS, TD-CDMA, WCDMA and other third-generation mobile communication systems. The capacity of communication is getting larger and larger, the quality of voice transmission is getting better and better, and more and more services are provided. Mobile communication is also playing an increasingly important role in people's life and work. However, the current equipment is developing towards miniaturization and broadband communication. Especially in 2002, since the U.S. Federal Communications Commission (FCC) announced 3.1GHz-10.6GHz as the ultra...

AI Technical Summary

Problems solved by technology

Usually this method will cause the mismatch between the antenna and the microwave circuit, and even reduce the overall performance of the system, so designing an ultra-wideband antenna with notch characteristics is one of the important methods to solve this problem

At the same time, some shortcomings of the existing UWB antennas are solved: (1) Most of the current UWB antennas use microstrip monopole antennas or coplanar waveguide-fed monopole antennas, and the size of these antennas is relatively large

In recent years, although ultra-wideband antennas based on slot antennas can meet the application requirements of UWB (3.1GHz-10.6GHz), the feeding method of these antennas and the combined size of slot lines require high machining accuracy, which is not convenient for actual debugging and production.

(2) At present, most ultra-wideband antennas usually need to drill holes during system integration, and use reactive elements to connect to the RF front-end, so the complexity of the system is increased, the performance of the system is reduced, and the needs of miniaturization cannot be met.

(3) In recent years, most of the ultra-wideband antennas with notch characteristics proposed by the academic circles mostly adopt the etching of various slots on the ground plane and the radiation element to realize the notch characteristics, so the etching The slot will produce electromagnetic wave leakage and affect the radiation pattern of the antenna

[0005] To sum up, currently proposed UWB antennas mainly adopt the form of monopoles to achieve UWB characteristics. In order to realize the compatibility between UWB systems and currently used narrowband Integrated filter, etching various grooves on the radiating element to suppress out-of-band signals and spurious signals, but the above technology increases the volume of the antenna, and etching various grooves on the antenna suppresses out-of-band signals and spurious signals The method of spurious signal destroys the shape of the radiation element of the antenna, thereby causing electromagnetic wave leakage and affecting the radiation pattern of the antenna

[0006] In order to further improve the radiation characteristics of the antenna and at the same time realize the cooperative work of the ultra-wideband communication system and the currently used narrowband system, the document "Small Square Monopole Antenna for UWB Applications with Variable Frequency Band-Notch Function, M.Ojaroudi, G.Ghanbari, N .Ojaroudi, C.Ghobadi, IEEE Antenna and Wireless Propagation Letters, 2009, Vol.8, pp.1061-1064." and the literature "Compact Monopole Antenna with Band-notched Characteristic for UWB Applications, H.W., Liu, C.H., Ku, T.S., Wang, C.F., YANG, IEEE Antenna and Wireless Propagation Letters, 2010, pp.397-400" proposed a method of implementing notches using microstrip tuning lines. These two antennas use microstrip feeding methods, but The size of the antenna is large, and there are many parameters that need to be adjusted, and it is not convenient for the design of multi-notch characteristics

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