Title :
Improvement in efficiency bandwidth product of UHF antenna on truncated ground plane
Author :
Morrow, I.L. ; Clow, N. ; Bertram, G.
Author_Institution :
Dept. of Inf. & Syst. Eng., Cranfield Univ., Shrivenham, UK
Abstract :
In this paper a low-cost printed High Impedance Surface (HIS) is presented for applications below 500 MHz. The HIS uses printed distributed inductance components to increase the effective sheet inductance and lower the electromagnetic band gap resonance frequency. This enabled a resonance unit cell size of λ/30 × λ/30 × λ/550. A 6×8 cell (18×24cm) PCB was constructed and simulated. Surface wave propagation measurements established dual TM/TE surface modes around 340 MHz with a band gap of 1% between them. Radiation pattern measurements of a PIFA integrated with the small HIS ground plane were compared with an identical PIFA on similar sized metal ground plane and demonstrated a higher radiation efficiency bandwidth product.
Keywords :
UHF antennas; UHF measurement; antenna radiation patterns; planar inverted-F antennas; PCB; PIFA; TM-TE surface modes; UHF antenna; efficiency bandwidth product; electromagnetic band gap resonance frequency; low-cost printed HIS ground plane; low-cost printed high impedance surface; printed distributed inductance components; radiation pattern measurements; resonance unit cell; sheet inductance; sized metal ground plane; surface wave propagation measurements; truncated ground plane; Antenna measurements; Antenna radiation patterns; Bandwidth; Impedance; Surface impedance; Surface waves; Transmission line measurements;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2011 Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4577-1014-8
Electronic_ISBN :
978-1-4577-1015-5
DOI :
10.1109/LAPC.2011.6114116
