Title:
METAL ANNULAR CAVITY-BASED ANNULAR TRAVELING-WAVE ANTENNA FOR GENERATING RADIO FREQUENCY ORBITAL ANGULAR MOMENTUM (OAM)
Document Type and Number:
WIPO Patent Application WO/2015/039580
Kind Code:
A1
Abstract:
Disclosed is an annular traveling-wave antenna based on a metal annular cavity for generating a radio frequency Orbital Angular Momentum (OAM) beam. The major structure is the metal annular cavity with a slot along the circle of its top surface. Two openings located in the metal annular cavity a distance of 1/4 circle apart and connecting with a metal waveguide are used as two excitation source ports of the antenna. When wave sources in a same frequency but having a phase difference of 90 degrees or -90 degrees are input to the two excitation source ports, the electromagnetic field in the metal annular cavity presents a traveling-wave distribution propagating along the circle in a clockwise or counterclockwise direction. The slot in the top surface of the metal annular cavity thus constitutes an annular traveling-wave antenna. Reasoned design of the dimensions of metal annular cavity and of the slot position allow for transition between microwave-guided wave mode and OAM mode, causing formation in space of a radio frequency OAM beam transmission with a different order I. The present invention realizes OAM beam transmission in a plane radio frequency waveguide structure using normal metal waveguides and will be of great importance to the developing field of high-speed radio frequency OAM communication.
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Inventors:
ZHENG SHILIE (CN)
ZHANG XIANMIN (CN)
CHI HAO (CN)
JIN XIAOFENG (CN)
ZHANG XIANMIN (CN)
CHI HAO (CN)
JIN XIAOFENG (CN)
Application Number:
PCT/CN2014/086334
Publication Date:
March 26, 2015
Filing Date:
September 12, 2014
Export Citation:
Assignee:
UNIV ZHEJIANG (CN)
International Classes:
H01Q7/00
Domestic Patent References:
| WO2005069443A1 | 2005-07-28 |
Foreign References:
| CN103474777A | 2013-12-25 | |||
| CN103474776A | 2013-12-25 | |||
| JP2009206909A | 2009-09-10 |
Attorney, Agent or Firm:
HANGZHOU QIUSHI PATENT OFFICE.,LTD. (CN)
杭州求是专利事务所有限公司 (CN)
杭州求是专利事务所有限公司 (CN)
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