Meta-Loaded Circular Sector Patch Antenna

Abstract

Abstract-A circular sector patch antenna loaded with a periodic metamaterial topology is presented. Several shapes of the circular sector patch are analyzed, and the input impedances and radiation patterns are compared. The topology reveals a nearly constant resonant frequency at zeroth-order resonance (ZOR) while the radiation performance approaches the one of the ZOR full circular patch antenna. Compared with rectangular and circular patch antennas, the sector patch offers more tuning possibilities. A matching network can be easily introduced to enhance the impedance bandwidth. Apart from the ZOR characteristics, this topology can also support a quasi-monopolar pattern at multiple modes. A semicircular patch operating at 4.1 GHz together with an impedance matching network and a dual-band semicircular patch antenna are fabricated and measured.

Generalized design approach to compact wideband multi-resonant patch antennas

“…Most compact microstrip patch antennas exhibit single or multiple narrow band characteristics 4,[6][7][8][10][11][12][13][14][15][16][17][18][19][21][22][23][24][26][27][28][29] with available bandwidth <10%. Although for most of the wideband designs, 5,9,20,25 only the fundamental mode within a single patch radiator is excited and used for the purpose of radiation.…”

“…The final one is the material loaded technique: Materials with high relative permittivity or permeability can be employed to miniaturize the antenna sizes at the cost of gain/efficiency reduction. Metamaterials based on frequency dispersive, periodic structures can also be used to miniaturize the antenna sizes at the cost of relatively narrow band operations.…”

CSRR Inspired Conductor Backed CPW-Fed Monopole Antenna for Multiband Operation

“…An antenna radiation pattern was improved by including dual-ring square-shaped SRR [24] and single/multi-ring rhombus-shaped SRR [25] in ground plane. Zeroth-Order Resonant (ZOR) MTM loaded circular sector antenna exhibited good radiation performance [26]. OCSRRs were included in radiating patch [27], and OCSRR included patch with modified ground plane [28] was proposed to achieve multiband antenna.…”