Title :
Pattern reconfigurable compact antenna
Author :
Debogovic, T. ; Bartolic, J.
Author_Institution :
Dept. of Wireless Comunications (FER), Univ. of Zagreb, Zagreb, Croatia
Abstract :
This paper presents a design of an compact antenna providing two diverse radiation patterns, which results from the excitation of two different modes. The antenna consists of a capacitively fed annular ring microstrip antenna, which can be shorted via shorting pins on its edges using pin diodes. Therefore, depending on the state of the pin diodes, the antenna operates in normal patch mode (TM11) or unipolar wire-patch mode. The resonance frequencies of both modes are nearly the same and they have overlapping 10 dB impedance bandwidths. In this design, only a single feed point is needed for both excitations. Detail design considerations are described. Simulated and experimental results are also presented and discussed.
Keywords :
antenna feeds; antenna radiation patterns; bandwidth allocation; microstrip antennas; p-i-n diodes; capacitively fed annular ring microstrip antenna; impedance bandwidth; pin diode; radiation pattern reconfigurable compact antenna; resonance frequency; shorting pins; unipolar wire-patch mode; Antenna radiation patterns; Conferences; Microstrip antennas; Microwave Theory and Techniques Society; Microwave antennas; Pins; Radiofrequency identification; Resonant frequency; Signal to noise ratio; Wireless sensor networks; annular ring microstrip antenna; pattern reconfigurability; pin diode; unipolar wire-patch antenna;
Conference_Titel :
Wireless Sensing, Local Positioning, and RFID, 2009. IMWS 2009. IEEE MTT-S International Microwave Workshop on
Conference_Location :
Cavtat
Print_ISBN :
978-1-4244-5060-2
Electronic_ISBN :
978-1-4244-5062-6
DOI :
10.1109/IMWS2.2009.5307875
