A planar compact metamaterial‐inspired broadband antenna

Abstract

resonator, respectively, by applying correction factor to calibrate the tolerance of the calculated resonant frequency. The openended coaxial cavity resonator suggested and designed in the study expects to be implied in many fields of measuring the frequency such as dielectric constant sensor, moisture sensor and so forth by using the characteristics of changing in resonant frequency and quality value as the amount of dielectric on the open side of the resonator varies.ABSTRACT: An electrically small, broadband-modified, truncated ground metamaterial EZ antenna is presented. This, a modified EZ antenna system, achieves a larger bandwidth of the order of 650 MHz by adjusting the metamaterial-inspired meandered ground element fed by a top loaded monopole. The design is devoid of the large ground planes and the external parasitic elements used in conventional designs for achieving proper impedance matching characteristics. The antenna requires a small foot print of k g /5 3 k g /10, where k g is the guided wavelength corresponding to the lowest frequency of operation, when printed on a substrate of dielectric constant 4.4 and thickness 1.6 mm. The antenna offers a 2:1 VSWR bandwidth from 750 MHz to 1.4 GHz, which covers CDMA, GSM, and ISM bands.

CSRR Inspired Conductor Backed CPW-Fed Monopole Antenna for Multiband Operation

“…Keeping MTM between patch and ground [17] and CSRR loaded ground of microstrip fed antenna [18] results in gain enhancement. A monopole antenna using composite MTM [19], an array of thin wire [20], and inclusion of transmission line MTM on patch [21] exhibited broadband response. SRR was loaded in the ground plane of a monopole antenna for achieving broadband impedance matching [22].…”