ii) Gain of an antenna can also be bettered by partially cutting slots in the substrate and by employing multiple layer dielectric substrates. iii) A reflector can be used behind the antenna so that the EM waves after striking the reflector will form a unidirectional beam thereby increasing antenna gain. How can I increase the gain of a CPW fed slot antenna? The antenna is a spiral slot fed by a CPW. It has good impedance matching but its gain is 0 dBi. How to increase antenna gain - Quora Oct 24, 2017 · Answer Wiki. You cannot increase gain in all directions. Highly directional antennas provide high gain in one direction with highly attenuating signals in other directions. It is an axiom of engineering — you never get something for nothing. The good news is that attenuating in some directions while increasing it in others is other just what you want.
A new kind of dual-band and high gain waveguide slot antenna is designed in this paper. By combining a folded plate and a double-layer metal structure with four apertures on its top floor, the proposed antenna has a dual-band characteristic and its gain reaches up to 11.9 dB with only 35 degrees (HPBW) of E-plane at 12.7 GHz and 12.1 dB with 39 degrees at 15.0 GHz.
If higher gain is desired, the antenna must necessarily be a narrow-band device. In fact, the input impedance becomes frequency sensitive so rapidly that, for large antennas, no significant increase in gain over that of the uniformly illuminated aperture is possible. Also, if the antenna … Impedance Bandwidth and Gain Improvement for … The configuration of the initial antenna with dimensions of 28 × 32 mm2 is shown in [14]. The bandwidth of that antenna is from 5.3 to 8.5 GHz for |S11| < -10 dB and the gain is generally above 4 dB with the peak of 7.2 dB. In the work reported this paper, three improvements were made. Enhanced-Gain Planar Substrate-Integrated Waveguide Cavity High-gain antennas have various applications such as in satellite platforms, radar systems, routers, and repeater systems. A number of enhancement techniques for antenna gain have been studied –.To realize enhanced-gain performance, a cavity-backed slot antenna (CBSA) is employed in this study because of its unidirectional characteristic.
International Journal of Antennas and Propagation is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the design, analysis, and applications of antennas, along with theoretical and practical studies relating the propagation of electromagnetic waves at all relevant frequencies, through ...
A slot antenna consists of a metal surface, usually a flat plate, with one or more holes or slots cut out. When the plate is driven as an antenna by a driving ... ENHANCEMENT OF BANDWIDTH AND GAIN OF MICROSTRIP PATCH ANTENNA When a U shaped slot is act inside the rectangular ... been demonstrated .Use of high permittivity superstrate loading technique gives an increase in antenna gain of
Slotted coaxial antennas have many advantages over traditional broadband panel antennas ... methods to increase the bandwidth of slotted coaxial antennas. .... As is seen in Figure 14, the expected gain in bandwidth will improve between.
Keywords: - bandwidth, dielectric constant, microstrip antenna, slot patch, substrate I. INTRODUCTION Communication can be broadly defined as the transfer of information from one point to another [1]. Communication between human beings was first done through voice. With the desire to increase the distance of Gain Enhancement of a Wide Slot Antenna Using a Second-Order ... Gain enhancement of a wide slot antenna over a wide frequency band using a low profile, second order bandpass frequency selective surface (FSS) as a super-strate is presented in this paper. The proposed multilayered FSS with non-resonant unit cells in each layer allows in-phase transmission of waves radiated from the antenna
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May 24, 2017 ... The antenna consists of a crossed slot antenna (CSA) and a MS placed ... Within the ARBW, the realized co-polarized gain can be increased by ...
Gain Enhancement of a Wide Slot Antenna Using a Second-Order ...