Metasurface For Microstrip-fed Slot Antennas
˝e overall power extracted from the LED through the metasurface electrode is rather small. For example, LEDs with slot-groove-array structure of 400nm spacing show the emission e˚ciency of about. A low-profile reconfigurable antenna with a capability of generating multidirectional beams is presented in this paper. The design consists of a 4 × 4 unit cells metasurface (MS), a four-slotted ground plane, and a reconfigurable feeding network. Slot Antenna, UWB Application Received: August 28, 2014 Revised: September 03, 2014 Accepted: September 04, 2014 A modified compact microstrip-fed slot antenna with desired WLAN band-notched characteristic Nasser Ojaroudi Department of Electrical Engineering, Germi Branch, Islamic Azad University, Germi, Iran Email address n.ojaroudi@yahoo.com.
Abstract
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.
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Mu-near-zero Metasurface For Microstrip-fed Slot Antenna
- Received 27 June 2017
Metasurface For Microstrip-fed Slot Antennas Long Range
DOI:https://doi.org/10.1103/PhysRevApplied.8.054048
Metasurface For Microstrip-fed Slot Antennas Ham Radio
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