Metasurface For Microstrip-fed Slot Antennas
- Mu-near-zero Metasurface For Microstrip-fed Slot Antenna
- Metasurface For Microstrip-fed Slot Antennas Ham Radio
Abstract
Improvement in the antenna gain is usually achieved at the expense of bandwidth and vice versa. This is where the realization of this enhancement can be made through compromising the antenna profile. In this work, we propose a new design of incorporating periodic metasurface array to enhance the bandwidth and gain while keeping the antenna to a low-profile scheme. The proposed antenna was. A new design for a microstrip-fed slot antenna (MFSA) is proposed and developed for improving bandwidth, gain and reducing back radiation. In contrast with most unidirectional MFSA, a metasurface as a superstrate is employed to reduce the back-lobe radiation and enhance the gain without a metal reflector.
- A microstrip-fed ultra-wideband slot antenna Abstract: Ultra-wideband (UWB) antennas have gained great interest since the US Federal Communication Commssion (FCC) released the generic admission for UWB in the frequency band between 3.1 GHz-10.6 GHz in 2002.
- Slot antenna array covered with MNZ metasurface slightly shifts to 5.8 GHz. It indicates that the antenna with designed metasurface placed on the top has a good matching condition, itself return loss cover the bandwidth 5.725 - 5.875 GHz. Whereas the return loss of the only U-slot array antenna is plotted in Fig.3 for comparison, thus.
The metasurface concept has emerged as an advantageous reconfigurable antenna architecture for beam forming and wave-front shaping, with applications that include satellite and terrestrial communications, radar, imaging, and wireless power transfer. The metasurface antenna consists of an array of metamaterial elements distributed over an electrically large structure, each subwavelength in dimension and with subwavelength separation between elements. In the antenna configuration we consider, the metasurface is excited by the fields from an attached waveguide. Each metamaterial element can be modeled as a polarizable dipole that couples the waveguide mode to radiation modes. Distinct from the phased array and electronically-scanned-antenna architectures, a dynamic metasurface antenna does not require active phase shifters and amplifiers but rather achieves reconfigurability by shifting the resonance frequency of each individual metamaterial element. We derive the basic properties of a one-dimensional waveguide-fed metasurface antenna in the approximation in which the metamaterial elements do not perturb the waveguide mode and are noninteracting. We derive analytical approximations for the array factors of the one-dimensional antenna, including the effective polarizabilities needed for amplitude-only, phase-only, and binary constraints. Using full-wave numerical simulations, we confirm the analysis, modeling waveguides with slots or complementary metamaterial elements patterned into one of the surfaces.
- Received 27 June 2017
DOI:https://doi.org/10.1103/PhysRevApplied.8.054048
Mu-near-zero Metasurface For Microstrip-fed Slot Antenna
© 2017 American Physical Society
