NDLI: Application of the PTD to cross-polarization prediction in a shaped-reflector antenna

Content Provider	IEEE Xplore Digital Library
Author	Hay, S.G.
Copyright Year	1995
Description	Author affiliation: Div. of Radiophys., CSIRO, Epping, NSW, Australia (Hay, S.G.)
Abstract	In recent years the physical theory of diffraction (PTD) has successfully been used to calculate the depolarizing effects of edges in the surfaces of planar and paraboloidal reflectors. These effects contribute to cross-polarized sidelobes in the radiation patterns of reflector antennas and in the PTD are calculated from an edge correction to the physical optics (PO) approximation to the induced current on the reflector surface. This approach is an attractive alternative to more rigorous moment methods for which the computational requirements rapidly increase as the size of the reflector increases in comparison to wavelength. However, earlier applications of the PTD to hyperboloidal reflectors were less successful, perhaps causing doubts about its effectiveness. In this paper first the accuracy of a PTD formulation is demonstrated in the case of a hyperboloidal reflector where previous PTD results are seen to be less accurate. The PTD formulation is then applied to obtain improved predictions of cross-polarization in a design for a shaped-reflector satellite antenna required to operate in both left- and right-hand circular polarizations. These results are shown to be much larger than for paraboloidal reflectors of similar size, suggesting that accurately evaluating edge effects may be necessary in designing shaped-reflector antennas for satellite applications.
Starting Page	1174
Ending Page	1177
File Size	206527
Page Count	4
File Format	PDF
ISBN	0780327195
DOI	10.1109/APS.1995.530228
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical surface waves Antenna radiation patterns Satellite antennas Polarization Reflector antennas Moment methods Satellite broadcasting Performance analysis Australia Physical theory of diffraction
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Radiation pattern of circularly polarized dual beam antennas

Shortcomings of cross polarisation prediction methods for reflector antennas

Different methods of PO analysis in a dual reflector antenna with a shaped main reflector

PO and PTD analyses of offset reflector antenna patterns

A contoured beam shaped reflector antenna for broadcasting satellites

Feed Scattering in Primary-Fed Reflector Antennas

Analysis of the radiation characteristics of the reflector antenna with surface distortion and holes using PTD

Cross polarization in dual reflector antennas--A PO and PTD analysis

A dual-satellite reflector antenna with shaped subreflectors

Application of the PTD to cross-polarization prediction in a shaped-reflector antenna

Similar Documents

Radiation pattern of circularly polarized dual beam antennas

Shortcomings of cross polarisation prediction methods for reflector antennas

Different methods of PO analysis in a dual reflector antenna with a shaped main reflector

PO and PTD analyses of offset reflector antenna patterns

A contoured beam shaped reflector antenna for broadcasting satellites

Feed Scattering in Primary-Fed Reflector Antennas

Analysis of the radiation characteristics of the reflector antenna with surface distortion and holes using PTD

Cross polarization in dual reflector antennas--A PO and PTD analysis

A dual-satellite reflector antenna with shaped subreflectors

Application of the PTD to cross-polarization prediction in a shaped-reflector antenna