Four-notch ultra-wideband antenna

Abstract

The invention discloses a four-notch ultra-wideband antenna which comprises a dielectric substrate, a radiation unit, a microstrip feeder and a metal ground layer, wherein the radiation unit and the microstrip feeder are arranged on one surface of the dielectric substrate, and the metal ground layer arranged on the other surface of the dielectric substrate. One end of the microstrip feeder is connected with the radiation unit, and the other end of the microstrip feeder extends towards the lower edge of the dielectric substrate along the length direction of the dielectric substrate, the radiation unit is provided with a first slot and a second slot which are used for forming two different notch frequency bands, two sides of the microstrip feeder are provided with two first parasitic branches and two second parasitic branches which are used for forming the other two different notch frequency bands, and the first slot and the second slot are a symmetrical structure relative to the longitudinal central axis of the microstrip feeder. The two first parasitic branches and the two second parasitic branches are symmetrically distributed on the two sides of the microstrip feeder respectively. According to the ultra-wideband antenna, mutual interference between a UWB communication system and four narrowband communication systems can be avoided at the same time, the notch performance is good, notches are mutually independent, and debugging is convenient.

Description

technical field [0001] The present invention generally relates to the technical field of antennas, in particular to a four-notch ultra-wideband antenna. Background technique [0002] Since the Federal Communications Commission of the United States allocated the 3.1-10.6GHz frequency band to ultra-wideband communication, ultra-wideband technology (Ultra-Wideband, UWB) has been widely used in commercial and civil wireless communication systems with short distances and high transmission rates. focus on. In the frequency band allocated by the existing UWB system, there are many narrowband communication systems, such as: 3.4GHz~3.6GHz wireless metropolitan area network (WiMAX), 5.725~5.825GHz wireless local area network (WLAN), 7.25~7.75GHz X Band downlink satellite signals and the 8.025-8.4GHz International Telecommunication Union frequency band (ITU), etc. [0003] In order to solve the problem of overlapping frequency bands between the UWB system and other wireless communica...

AI Technical Summary

Problems solved by technology

However, the introduction of a filter structure in an ultra-wideband system greatly increases the volume, complexity and cost of the system, and the existing ultra-wideband antenna with a notch function that works in the ultra-wideband range and does not additionally add a filter structure is disclosed The report usually does not exceed three notches, which cannot meet the needs of ultra-wideband communication systems at this stage

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