Title :
Maximum directivity of a series-fed microstrip array antenna for wireless application
Author :
Aumann, Herbat M. ; Tuttle, Kristan A. ; Willwerth, Francis G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maine, Orono, ME, USA
Abstract :
An omnidirectional colinear microstrip array antenna is modeled as a ladder network. A formula is derived for the maximum directivity of a series-fed colinear antenna with an infinite number of ladder sections. It is shown that the maximum directivity is asymptotically limited and depends upon the product of the series impedance and shunt admittance of the equivalent ladder network. The result is verified by simulation and experiment.
Keywords :
directive antennas; electric admittance; ladder networks; microstrip antenna arrays; omnidirectional antennas; ladder network; ladder section; omnidirectional colinear microstrip array antenna; series impedance; series-fed colinear antenna directivity; series-fed microstrip array antenna; shunt admittance; wireless application; Arrays; Frequency measurement; Phase measurement;
Conference_Titel :
Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on
Conference_Location :
Spokane, WA
Print_ISBN :
978-1-4244-9562-7
DOI :
10.1109/APS.2011.5996534
