Title :
A closely spaced switched beam antenna
Author :
Arai, Hiroyuki ; Noguchi, Akira
Author_Institution :
Grad. Sch. of Eng., Yokohama Nat. Univ., Yokohama, Japan
Abstract :
This paper presents a switched beam antenna consisting of closely spaced two monopoles fed by its optimum amplitude and phase condition to obtain high gain in end-fire direction. The large mutual coupling is reduced by a decoupling circuit, and then a cardioid pattern is switched by selecting feeding port. The decoupling circuit is also replaced by a capacitor to keep the same network condition. This paper also discusses the super-directive condition of this array.
Keywords :
antenna feeds; antenna radiation patterns; capacitors; monopole antenna arrays; capacitor; cardioid pattern; closely spaced switched beam antenna; closely spaced two monopole antenna; decoupling circuit; end-fire direction; large mutual coupling reduction; network condition; optimum amplitude condition; phase condition; selecting feeding port; super-directive condition; Antenna arrays; Arrays; Directive antennas; Mutual coupling; Ports (Computers); Switches; decoupling circuit; monopole array; super-directive antenna; switched beam;
Conference_Titel :
Antenna Technology: "Small Antennas, Novel EM Structures and Materials, and Applications" (iWAT), 2014 International Workshop on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4799-2331-1
DOI :
10.1109/IWAT.2014.6958626
