Title :
Design of a flexible Minkowski-like pre-fractal (MLPF) antenna with different ground planes for VHF LMR
Author :
Lee, E.C. ; Soh, P.J. ; Hashim, N.B.M. ; Vandenbosch, G.A.E. ; Mirza, H. ; Adam, I. ; Ooi, S.L.
Author_Institution :
Sch. of Comput. & Commun. Eng., Univ. Malaysia Perlis (UniMAP), Kuala Perlis, Malaysia
Abstract :
This work investigates the suitability of a flexible Minkowski-like pre-fractal antenna (MLPF) for application in the Very High Frequency (VHF) Land and Mobile Radio (LMR) frequency bands (136-174 MHz). The proposed center-fed, third iteration antenna has been manufactured using both copper tape and Shield It Super, a conductive textile. It has been tested on four types of ground plane, i.e. rectangular, fractal Minkowski, meander line and L-shaped. It is observed that an L-shaped ground plane performs the best, and provides an additional frequency tuning parameter to the overall structure. Simulated and measured S11 show a good agreement and the proposed antenna is working within the desired frequency range. A simulated gain and efficiency of more than 1.9 dB and 76 %, respectively, are obtained. The measurement in a Satimo SG64 anechoic chamber provided 0 dB gain and about 48 % efficiency.
Keywords :
antenna feeds; fractal antennas; mobile radio; MLPF antenna; Minkowski-like prefractal antenna; Satimo SG64 anechoic chamber; VHF LMR; center-fed antenna; conductive textile; copper tape; efficiency 76 percent; frequency 136 MHz to 174 MHz; frequency tuning parameter; gain 0 dB; gain 1.9 dB; ground planes; third iteration antenna; very high frequency land and mobile radio; Antenna measurements; Antenna radiation patterns; Copper; Gain; Gain measurement;
Conference_Titel :
Antenna Technology (iWAT), 2011 International Workshop on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-9133-9
DOI :
10.1109/IWAT.2011.5752333
