Quad-Frequency Linearly-Polarized and Dual-Frequency Circularly-Polarized Microstrip Patch Antennas With CRLH Loading

Abstract

Abstract-In this paper, a novel technique to develop multifrequency microstrip patch antennas with polarization diversity or circular polarization is presented. The proposed approach consists of exciting modes with orthogonal polarizations in microstrip patches partially filled with Composite Right/Left-Handed (CRLH) cells. Two different kinds of quad-frequency single-layer patch antennas are proposed. The first one has two orthogonal ports with high isolation between them. The second kind of quad-frequency patch antennas consists of exciting the four modes with two orthogonal polarizations through only one port. Finally, the proposed approach is used to develop dual-frequency circularly-polarized (CP) patch antennas by exciting the modes with orthogonal polarizations in quadrature phase. Prototypes of all the designs are manufactured and measured, showing good performance.

Tetra-Frequency Microstrip Antenna for Wireless Applications

“…The frequencies are selected by studying the existing work for quadruple frequency antenna [19,20,21], so that the antenna contains a new set of frequencies. One of the uses of this multi-frequency antenna can be in automobiles where:  5 GHz band (Automobile IPTV) -can be used for better QoS providing superior image and audio quality and interference-free transmission  6 GHz (Automatic/Electronic Toll Collection (ETC)) -can be used to allow charging tolls without vehicles having to slow down.…”

Small-Size Wideband Monopole Antenna With CRLH-Tl for Lte Mobile Phone

“…Compared with LTE antennas in the terminal devices in [1][2][3][4][5][6][7][8][9][10], the monopole which consists of two arms and loaded CRLH-TL has a relatively simple structure. The left arm is designed to resonate at around 800 MHz, so the electrical length of the antenna's left arm should be approximately a quarter of the wavelength at the lowest frequency, i.e., at 0.74 GHz which is about 90 mm.…”

“…In the last decade, composite right and left handed transmission line (CRLH-TL) which develops from left-handed materials (LHMs) has been applied in some microwave circuits and antenna [8][9][10][11][12]. Left-handed materials possess unique electromagnetic (EM) properties such as anti-parallel phase, group velocities, and zero propagation constant, with which abnormal radiation, size reduction and wideband antenna can be realized.…”

The Improvement of Array Antenna Performance With the Implementation of an Artificial Magnetic Conductor (Amc) Ground Plane and in-Phase Superstrate

“…A microstrip antenna is a preferable choice in antenna design due to its low profile, low cost, ease of fabrication, and low weight and volume [11][12][13]. However, a microstrip antenna posses the drawbacks of low gain, narrow BW (typically 5%) [14,15], and low efficiency and power [16].…”