PURPOSE: To improve the cross polarization characteristic by providing a second feeder, which is connected to a single point feed type circularly polarized radiating element orthogonally to the feed direction of a first feeder connected to the single point feed type circularly polarized wave radiating ...
arized horn antenna Circularly polarized horn antennaCircularly polarized horn antennadoi:US20090033579 A1USUS20090033579 * 2007年8月3日 2009年2月5日 Lockhead Martin Corporation Circularly polarized horn antenna
A method for designing circularly-polarized (CP) horn antenna is proposed, which is based on a standard pyramidal horn with a linear-to-circular polarization transformer. A compact transparent metasurface transformer is first designed to perform linear-to-circular polarization transformation, and then ...
US4494117 1982年7月19日 1985年1月15日 The United States Of America As Represented By The Secretary Of The Navy Dual sense, circularly polarized helical antennaUS4494117 * 1982年7月19日 1985年1月15日 The United States Of America As Represented By The Secretary Of The Navy Dual sense, ...
This antenna is composed of a dual circularly polarized feed and a choke horn antenna. This feed is a cross-shaped slot in the ground plane which provides coupling between a patch and a ring microstrip line with two ports. It is located at the centre of a choke horn antenna. The ...
A circularly polarized (CP) substrate integrated waveguide (SIW) antenna is presented. First, our study demonstrates that wide axial-ratio beamwidth can be achieved by exciting a square slot with four pins. Second, gap rings are employed around the pins to control the resonant frequency of the ...
This communication reports observations made with a circularly polarized feed horn on the 140 ft. radio telescope of the National Radio Astronomy Observatory, Green Bank, West Virginia, between November 11 and 12, 1965. The-receiver used was an autocorrelation-type radiometer with 100 channels 2 ....
PURPOSE: To provide a horn shared by circularly polarized wave/linear polarized wave which is capable of receiving small-sized and inexpensive circularly polarized wave/linear polarized wave. ;CONSTITUTION: This horn is composed of a circular waveguide 22 having an opening part at one end and a ...
申请(专利权)人: YAGI ANTENNA CO LTD 八木アンテナ株式会社 发明人:T Shuzo,高野 修三,S Koji,坂内 功治,T Tadateru,富田 忠照 摘要: PURPOSE: To provide a horn shared by circularly polarized wave/linear polarized wave which is capable of receiving small-sized and inexpensive circularly ...
circularly polarized DRA, which can be realized by single or multiple feed mechanisms. The single feed mechanism has a relatively simple structure but limited CP bandwidth. Moreover, the antenna’s radiation performance can be degraded due to the asymmetry of the excitation. On the other hand, ...