Ultra-wideband antenna

Abstract

The invention discloses an ultra-wideband antenna, comprising a medium substrate, a radiator, two main parasitic units, a microstrip feeder, and a coaxial connector. The medium substrate is provided with a first surface and a second surface which is opposite to the first surface. The radiator comprises a feed-in portion, and two radiation arms. The radiator and the two main parasitic units are arranged on the first surface. The microstrip feeder is arranged on the second surface in an L shape. The coaxial connector is fixedly arranged on the bottom of the medium substrate. The feed-in portion of the radiator and the vertical part of the microstrip feeder are electrically connected with the coaxial connector at the same time. Through arranging the two radiation arms which are distributed symmetrically, and forming a gradually changing gap between the two radiation arms, impedance characteristic of an antenna is improved, and impedance bandwidth of the antenna is broadened. Through forming at least a groove on the tail end of each radiation arm, high-frequency standing-wave ratio characteristic can be improved, and circumferential distribution of a plurality of groups of radiation arms is convenient.

Description

technical field [0001] The invention relates to a communication antenna, in particular to an ultra-wideband antenna. Background technique [0002] Ultra-wideband antenna communication technology (UWB) generally refers to a radio technology with a signal bandwidth greater than 1.5 GHz or a bandwidth ratio (the ratio of signal width to center frequency) greater than 25%. The UWB antenna is a key component in the UWB wireless communication system, and the performance of the antenna will directly affect the performance of the entire system. [0003] With the advancement of mobile communication technology and the rapid expansion of mobile Internet, the ultra-broadband wireless communication system continues to expand, and multiple systems coexist, and the working frequency bands of various systems are also expanding, from the early GSM 1800 (1710 ~ 1880MHz); PCS1850~1990MHz, UMTS 1920~2170MHZ, mid-term TD-SCDMA (1880~1920MHz, 2010~2025MHz, 2300~2400MHz); Wimax and TD-LTE communi...

AI Technical Summary

Problems solved by technology

[0003] With the advancement of mobile communication technology and the rapid expansion of mobile Internet, the ultra-broadband wireless communication system continues to expand, and multiple systems coexist, and the working frequency bands of various systems are also expanding, from the early GSM 1800 (1710 ~ 1880MHz); PCS1850~1990MHz, UMTS 1920~2170MHZ, mid-term TD-SCDMA (1880~1920MHz, 2010~2025MHz, 2300~2400MHz); Wimax and TD-LTE communication frequency band (2300~2690MHz), and now LTE-A (3500MHz ~3600MHz), so that the number of antennas and corresponding equipment increases, which increases the operating costs of telecom operators

[0004] However, in the existing technical solutions, the omnidirectional antenna composed of half-wave dipoles has narrow bandwidth, as document 1. "A broadband printed dipole and a printed array for base station applications" (IEEE Antennas and Propagation Society International symposium, 2008 The bandwidth of the antenna model in :1-4) is 41%, and the bandwidth of the antenna model in Document 2. "Printed broadband dipole antenna with tapered arms for multi-band applications" (Signals Systems and Electronics, International Symposium, 2010: 1-3) 48%

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