What is slot in patch antenna?

Slots are mainly created to have new resonance frequency. When they are placed at the bottom layers, the gain of the antenna will increase. In more of the cases, if slots are done on the patch, the gain will decreases in cost of additional resonance due to the metallic diminution.

What are slot antenna used for?

Slot antennas are usually used at UHF and microwave frequencies at which wavelengths are small enough that the plate and slot are conveniently small. At these frequencies, the radio waves are often conducted by a waveguide, and the antenna consists of slots in the waveguide; this is called a slotted waveguide antenna.

What is slot coupled patch antenna?

A slot coupled patch antenna with two slots on the ground plane and a non symmetric U-shaped feed line is reported at the frequency range of 10–22GHz (75\%) [38]. In this paper a similar idea is used for C and X bands presenting an antenna structure with a rectangular patch.

What is slot antenna?

The U-slot patch antenna was originally developed as a single-layer, single-patch wideband antenna. It has recently been shown that it can also be designed to perform a number of other functions. U-slot Microstrip patch antennas were originally developed for bandwidth broadening applications.

Where are patch antennas used?

The patch antenna is mainly practical at microwave frequencies, at which wavelengths are short enough that the patches are conveniently small. It is widely used in portable wireless devices because of the ease of fabricating it on printed circuit boards.

Is patch antenna omnidirectional?

Abstract: An omnidirectional microstrip patch antenna, capable of reconfiguring both polarisation and radiation pattern is proposed. It operates with two orthogonal ±45° slanted linear polarisations and can produce two dipole-like radiation patterns, providing 360° coverage in either the horizontal or elevation plane.

How does a patch antenna work?

Working of Patch Antenna. A microstrip or patch antenna operates in a way that when current though a feed line reaches the strip of the antenna, then electromagnetic waves are generated. The waves from the patch start getting radiated from the width side.