Title :
Design and evaluation of a class of miniaturized metal-backed antenna
Author :
Jiangfeng Wu ; Sarabandi, Kamal
Author_Institution :
Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
This paper presents a two-layer mushroom-like reactive impedance surface (RIS) and its application to patch antenna miniaturization. RIS, known as meta-substrate, have shown the ability to miniaturize printed antennas with omni-directional radiation pattern, when served as the substrate for the antenna (H. Mosallaei and K. Sarabandi, IEEE Trans. Antennas Propag., 52, 9, 2403-14, 2004). However, the area of conventional RIS substrate usually has to much larger than that of miniaturized antenna, since the cell´s dimension is comparable with the antenna, even using a high dielectric constant of 10.2 or 25. The proposed compact two-layer RIS can achieve 76% lower frequency than conventional one-layer RIS with the same size, whose cell dimensions are limited within λ0/45 in length and λ0/100 in height while the dielectric constant is kept below 3.5. This makes it possible to design a miniaturized antenna over an RIS substrate with the same size as the antenna itself.
Keywords :
antenna radiation patterns; microstrip antennas; omnidirectional antennas; substrates; RIS substrate; antenna substrate; compact two-layer RIS; high dielectric constant; meta-substrate; miniaturized antenna; miniaturized metal-backed antenna design; miniaturized metal-backed antenna evaluation; omni-directional radiation pattern; patch antenna miniaturization; printed antennas; two-layer mushroom-like reactive impedance surface; Antenna radiation patterns; Directive antennas; Impedance; Patch antennas; Substrates; Surface impedance;
Conference_Titel :
Radio Science Meeting (USNC-URSI NRSM), 2013 US National Committee of URSI National
Conference_Location :
Boulder, CO
Print_ISBN :
978-1-4673-4776-1
DOI :
10.1109/USNC-URSI-NRSM.2013.6524994