Wideband monopole microstrip antenna

Abstract

The invention discloses a wideband monopole microstrip antenna. The wideband monopole microstrip antenna includes a dielectric substrate, a circular radiating patch, a parasitic circular ring radiating patch, a metal grounding plate and a coaxial line, wherein the circular radiating patch and the parasitic circular ring radiating patch are printed on the upper surface of the dielectric substrate, and the metal grounding plate is arranged at the lower surface of the dielectric substrate and is connected with the bottom end of the dielectric substrate; and feeding holes are formed in the dielectric substrate; and the radiating units with short-circuiting holes, namely, the circular radiating patch and the parasitic circular ring radiating patch, can generate two working modes (TM01 and TM02) and four resonant frequencies, and therefore, the bandwidth of the antenna can be effectively increased. The short-circuiting holes are adopted, and therefore, the equivalent inductance of the antenna can change, and the TM01 mode can be enabled; the parasitic circular ring radiating patch with short-circuiting holes is additionally adopted, so that the capacitance distribution of the antenna can be changed, and therefore, the novel resonant mode TM02 can be exited, and the band of the antenna can be expanded.

Description

technical field [0001] The present invention relates to the technical field of antennas, and more specifically, relates to a wideband monopole microstrip antenna that can be used in WLAN wireless communication. Background technique [0002] Antenna is an important part of wireless communication, and the performance of antenna directly affects the normal operation of the entire communication system. Monopole microstrip antenna has the characteristics of small size, low profile, low cost, easy manufacture, high gain and omnidirectional radiation, so it has been extensively researched and developed in the past two decades. However, with the continuous development of wireless communication technology, the communication system not only requires high-quality transmission of voice, data and image information, but also requires the broadband of the communication system. The impedance bandwidth of the traditional monopole microstrip antenna is narrow, which limits its The applicatio...

AI Technical Summary

Problems solved by technology

However, with the continuous development of wireless communication technology, the communication system not only requires high-quality transmission of voice, data and image information, but also requires the broadband of the communication system. The impedance bandwidth of the traditional monopole microstrip antenna is narrow, which limits its application in communication systems, so how to expand the antenna bandwidth has become a hot spot in current research

Some methods have been proposed in the existing literature on increasing the bandwidth, such as increasing the thickness of the dielectric and reducing the dielectric constant of the substrate, etc., but these methods will deteriorate the antenna radiation pattern and excite some higher-order modes.

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