DocumentCode :
2808269
Title :
Frequency scanning antennas
Author :
Ishimaru, A. ; Hang-Sheng Tuan
Author_Institution :
University of Washington, Seattle, WA, USA
Volume :
9
fYear :
1966
fDate :
21-25 March 1966
Firstpage :
101
Lastpage :
109
Abstract :
This paper presents the theory of 180 degree scanning for a linear array and Tchebyscheff array by frequency variation and discusses the relationships between the linear array theory and the 
diagram of periodic structures. Each element is excited by an equivalent slow wave structure which is either non-dispersive or dispersive. At a center frequency, the spacing is an integral multiple of guide wavelength 
. It is shown that this is in fact the -Mth space harmonic in the so-called forbidden region, and all the other harmonics are slow. For a given frequency range, the necessary phase velocity and other parameters are determined in order to obtain 180 degree scanning without causing other main beams, and the example is carried out for the X-band frequency range.
diagram of periodic structures. Each element is excited by an equivalent slow wave structure which is either non-dispersive or dispersive. At a center frequency, the spacing is an integral multiple of guide wavelength . It is shown that this is in fact the -Mth space harmonic in the so-called forbidden region, and all the other harmonics are slow. For a given frequency range, the necessary phase velocity and other parameters are determined in order to obtain 180 degree scanning without causing other main beams, and the example is carried out for the X-band frequency range.Keywords :
Antenna accessories; Antenna radiation patterns; Attenuation; Directive antennas; Frequency; Linear antenna arrays; Microwave integrated circuits; Periodic structures; Phase shifters; Phased arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
1958 IRE International Convention Record
Conference_Location :
New York, NY, USA
Type :
conf
DOI :
10.1109/IRECON.1961.1151012
Filename :
1151012
Link To Document :
