A novel design of a CPW‐fed square slot antenna with broadband circular polarization

Abstract

A novel design of a broadband circularly polarized square slot antenna fed by a single coplanar waveguide is proposed and discussed. The circularly polarized radiation is achieved by means of using an outer rectangular ring and an inner rectangular ring at the center of a square slot. The proposed antenna has the fundamental resonant frequency of 2.44 GHz with the return loss of −40.93 dB, and it has the bandwidth of 3 dB axial ratio of 420 MHz or (17.21%). Details of the results are presented and discussed. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2456–2459, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21951

CPW‐fed broadband circularly polarized rectangular slot antenna with L‐shaped feed line and parasitic elements

“…Having various advantages of low radiation loss, less dispersion, and scope of easy integration with solid state devices, coplanar waveguide (CPW) feed becomes more attractive than microstrip feed . Therefore, CPW‐fed CP slot antenna have drawn more attraction recently . In , CP is obtained by etching a longitudinal slot at a middle point of a stair‐shaped slot.…”

“…While in , cross patch was placed in the slot to get CP radiation. Other wideband CP was achieved by protruding a metallic strip from the signal line of the feeding CPW in to slot . L‐shaped strip at the ground plane and vertical stub at the feed line were used in to generate CP.…”

CPW-Fed Stair-Shaped Slot Antennas With Circular Polarization

“…Manuscript One of the yet unexplored potentialities of this architecture is its intrinsic capability to attenuate the system phase noise in frequency-modulated, continuos-wave (FMCW) radars, a feature that is determinant for ensuring the system's ability to identify targets [4]. By virtually collocating the transmit (T) and receive (R) antennas, interleaving yields a substantial reduction of the signal leakage paths and, thus, phase noise suppression.…”

“…For the slot antenna, the requirements can be accomplished by adjusting the geometrical topology of the slot or the feeding line [1]- [7]. The CPW structure has the advantages of the low radiation loss, the less dispersion in comparison to a microstrip feed and the easy incorporation of MMIC modules or semiconductor devices for the design of the active-integrated antennas, so the CPW-fed circularly-polarized (CP) slot antenna has attracted more attention recently [4]- [6]. By employing a quasi-loop feeding structure or protruding a metallic strip from the ground plane, the wideband circular polarization is achieved.…”

A wideband circular polarization antenna with tuning rectangular slot fed by CPW

“…The CP antenna design was discussed in the literature for improving the return loss as well as the axial ratio (AR) [1] - [3]. A technique is that used on a printed slot antenna for improving the wider impedance bandwidth compared to typically circular microstrip patch antenna.…”