Title :
Matching two-arm spiral impedance without balun
Author :
Anthony, Theodore K. ; Zaghloul, Amir I.
Author_Institution :
US Army Res. Lab., Adelphi, MD, USA
Abstract :
Spiral antennas can be designed to cover decades of bandwidth (e.g. 350-8350 MHz). Connecting the antenna directly to the coaxial cable without a balun would reduce fabrication costs without sacrificing realized gain. This paper shows how two-arm spiral antennas can be designed to have a broadband impedance close to 50 Ohms, rather than the traditional 180 Ohms, without the need to make and attach a balun.
Keywords :
UHF antennas; coaxial cables; impedance matching; microwave antennas; spiral antennas; broadband impedance; coaxial cable; fabrication cost reduction; frequency 350 MHz to 8350 MHz; spiral antennas; two-arm spiral antennas; two-arm spiral impedance matching; Broadband antennas; Coaxial cables; Impedance; Impedance matching; Spirals;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE
Conference_Location :
Memphis, TN
Print_ISBN :
978-1-4799-3538-3
DOI :
10.1109/APS.2014.6904988
