NDLI: Dyson conical quad-spiral array as ultrawideband feed system

Content Provider	IEEE Xplore Digital Library
Author	Garcia, E. Llorente Romano, S. Garcia Lamperez, A. Herraiz Martinez, F.J. Salazar Palma, M. Segovia Vargas, D. Serna Puente, J.M. Tercero, F. Lopez Perez, J.A. Colomer, F. Lopez Fernandez, J.A.
Copyright Year	2015
Description	Author affiliation: Dept. de Teor. de la Senal y Comun., Univ. Carlos III de Madrid, Leganés, Spain (Garcia, E.; Llorente Romano, S.; Garcia Lamperez, A.; Herraiz Martinez, F.J.; Salazar Palma, M.; Segovia Vargas, D.) \|\| Centro Astron. de Yebes, Observatorio Astron. Nac., Yebes, Spain (Serna Puente, J.M.; Tercero, F.; Lopez Perez, J.A.; Colomer, F.; Lopez Fernandez, J.A.)
Abstract	VLBI2010 requires a feed that simultaneously has high efficiency over the full 2-14 GHz frequency range. The simultaneity requirement implies that the feed must operate at high efficiency over the full frequency range without the need to adjust its focal position to account for frequency dependent phase center variations. Two feeds meet this specification with some lacks to be fulfilled [1]: The Eleven Feed developed at Chalmers University and the Quadruple Ridged Flared Horn (QRFH) developed at the California Institute of Technology. In this frame, Universidad Carlos III de Madrid has developed a new topology for complete covering the requirements of the VLBI2010, including two new pretty attractive characteristics: dual circular polarization (versus the dual lineal solutions present in the state of the art) and constant input impedance of the antenna due to its self-complementary geometry, what is highly interesting for the LNA design. This manuscript is divided as follows: first, results of the complete system using an ideal Gaussian feed are summarized. Then, the new topology proposed is presented and analyzed both, isolated and integrated in the radiotelescope. Finally, a closed solution for covering all the requirements has been manufactured and results from full wave electromagnetic simulations together with measurements are presented. Conclusions and future lines are presented at the end of the present manuscript.
Starting Page	1
Ending Page	5
File Size	1688925
Page Count	5
File Format	PDF
e-ISBN	9781479989430
DOI	10.1109/LAPC.2015.7366038
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-02
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Geometry Antenna measurements VLBI2010 Polarization Ultrawideband antenna conical spiral antenna Antenna feeds Radioastronomy Antenna radiation patterns
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

Dyson conical Quad-Spiral Array for VLBI2010

Circular polarization broadband antenna feed

Patterns of the three-band feed for a small VLBI radiotelescope reflector antenna

Polarization reconfigurable patch array antenna

Polarization reconfigurable patch antenna with asymmetrical Y-shaped feed

New topology ultrawideband antenna for VLBI2010

Modified feed system for a reflector

Circularly polarized conical patterns from cirular microstrip antennas

A wideband low-profile conical beam antenna with horizontal polarization

Dyson conical quad-spiral array as ultrawideband feed system

Similar Documents

Dyson conical Quad-Spiral Array for VLBI2010

Circular polarization broadband antenna feed

Patterns of the three-band feed for a small VLBI radiotelescope reflector antenna

Polarization reconfigurable patch array antenna

Polarization reconfigurable patch antenna with asymmetrical Y-shaped feed

New topology ultrawideband antenna for VLBI2010

Modified feed system for a reflector

Circularly polarized conical patterns from cirular microstrip antennas

A wideband low-profile conical beam antenna with horizontal polarization

Dyson conical quad-spiral array as ultrawideband feed system