Title :
A design method of offset Fresnel zone plate reflector as receiving antenna
Author :
Onodera, T. ; Hoashi, T.
Author_Institution :
Dept. of Electron. Eng., Kumamoto Inst. of Technol., Japan
Abstract :
The Fresnel zone plate reflector (FZPR) as a receiving antenna consists of a Fresnel zone plate lens (FZPL), a reflecting plate (reflector) placed a quarter wavelength from the FZPL and a conical horn for the receiver. Usually the FZPR uses the non-blocking offset configuration, by which the FZPL is composed from elliptical zones. The FZPR is also called an offset phase reversal zone plate reflector and is the object for study in this paper. The paper describes a calculation method for the characteristics of the FZPR based upon Kirchhoff´s diffraction integral formula. The method shows how to determine an optimum position and diameter of the conical horn and calculates the relation between offset angles and receiving powers. Then the calculation method is verified by building and measuring four FZPRs with 90/spl deg/ offset angle and different focal length.
Keywords :
horn antennas; lens antennas; offset reflector antennas; receiving antennas; zone plates; Fresnel zone plate lens; Kirchhoff´s diffraction integral formula; conical horn; design method; non-blocking offset configuration; offset Fresnel zone plate reflector; offset phase reversal zone plate reflector; receiving antenna; reflecting plate; Apertures; Design engineering; Design methodology; Fresnel reflection; Horn antennas; Integral equations; Lenses; Phase frequency detector; Receiving antennas; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.789421
