A low-profile and high-gain multilayered slot antenna based on the fabry-perot cavity and the mushroom-like electromagnetic gap band structure

A novel millimeter wave coplanar waveguide (CPW) fed Fabry-Perot (F-P) antenna with high gain, broad bandwidth, and low profile is reported. The partially reflective surface (PRS) and the ground form the F-P resonator cavity, which is filled with the same dielectric substrate. A dual rhombic slot loop on the ground acts as the primary feeding antenna, which is fed by the CPW and has broad bandwidth. In order to improve the antenna gain, metal vias are inserted surrounding the F-P cavity. A CPW-to-microstrip transition is designed to measure the performances of the antenna and extend the applications. The measured impedance bandwidth ofS11less than −10 dB is from 34 to 37.7 GHz (10.5%), and the gain is 15.4 dBi at the center frequency of 35 GHz with a 3 dB gain bandwidth of 7.1%. This performance of the antenna shows a tradeoff among gain, bandwidth, and profile.

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A Low-Profile High-Gain Substrate-Integrated Waveguide-Slot Antenna With Suppressed Cross Polarization Using Metamaterial

IEEE Antennas and Wireless Propagation Letters ◽

10.1109/lawp.2017.2654260 ◽

2017 ◽

Vol 16 ◽

pp. 1614-1617 ◽

Cited By ~ 13

Author(s):

Soumen Pandit ◽

Akhilesh Mohan ◽

Priyadip Ray

Keyword(s):

High Gain ◽

Slot Antenna ◽

Substrate Integrated Waveguide ◽

Cross Polarization ◽

Waveguide Slot ◽

Low Profile ◽

Waveguide Slot Antenna

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Design of a Substrate-Integrated Fabry-Pérot Cavity Antenna forK-Band Applications

International Journal of Antennas and Propagation ◽

10.1155/2015/373801 ◽

2015 ◽

Vol 2015 ◽

pp. 1-12 ◽

Cited By ~ 6

Author(s):

Truong Khang Nguyen ◽

Ikmo Park

Keyword(s):

Coplanar Waveguide ◽

Ground Plane ◽

Cost Effective ◽

Frequency Selective Surface ◽

High Gain ◽

Hole Array ◽

Impedance Bandwidth ◽

Low Profile ◽

Fabry Perot ◽

Feeding Structure

This paper presents the design of a planar, low-profile, high-gain, substrate-integrated Fabry-Pérot cavity antenna forK-band applications. The antenna consists of a frequency selective surface (FSS) and a planar feeding structure, which are both lithographically patterned on a high-permittivity substrate. The FSS is made of a circular hole array that acts as a partially reflecting mirror. The planar feeding structure is a wideband leaky-wave slit dipole fed by a coplanar waveguide whose ground plane acts as a perfect reflective mirror. The measured results show that the proposed antenna has an impedance bandwidth of more than 8% (VSWR ≤ 2), a maximum gain of 13.1 dBi, and a 3 dB gain bandwidth of approximately 1.3% at a resonance frequency of around 21.6 GHz. The proposed antenna features low-profile, easy integration into circuit boards, mechanical robustness, and excellent cost-effective mass production suitability.

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