How can you design a patch antenna to be circularly polarized?

How can you design a patch antenna to be circularly polarized?

Conventional designs of single-feed micro strip antennas for circular polarization (CP) are usually achieved by truncating patch corners of a square patch, using nearly square or nearly circular patches, cutting a diagonal slot in the square or circular patches, protruding or inserting a pair of symmetric perturbation …

What is circularly Polarised antenna?

Circular Polarization: In a circularly-polarized antenna, the plane of polarization rotates in a corkscrew pattern making one complete revolution during each wavelength. A circularly- polarized wave radiates energy in the horizontal, vertical planes as well as every plane in between.

What is dual circularly polarized antenna?

Abstract: A dual circularly polarized antenna with improved axial ratio (AR) bandwidth is described in this paper. The proposed antenna is a substrate integrated waveguide (SIW) cavity backed crossed slot antenna with a parallel feed configuration.

What is the polarization of microstrip patch antenna?

A rectangular microstrip patch antenna normally radiates a linearly polarized wave with about 6-7 dBi gain at broadside. Higher gains (up to 10 dBi) can be achieved by using different means including large patch heights and parasitic patches.

What is circular microstrip antenna?

The ANSI-based circular microstrip patch antenna is designed to work at 7.4GHz. and 12GHz using HFSS simulator software for various WLN (Wireless Local Area Network) applications, Bluetooth, and IoT communications. The circular patch antenna is made using FR4, which is 4.4 KE, 1.6 mm high, and has a gain of 3 dB.

How do you find circular polarization?

Circular polarization is obtained by either of the two techniques: by changing width-to-length ratio of the patch or the dimensions of the mushroom-like structure. Use of coaxial feed implies low impedance and axial ratio bandwidths. The antenna has an impedance bandwidth of 4.6 % and axial ratio bandwidth of 1.46 %.

How do you make circularly polarized light?

Circularly polarized light may be produced by passing linearly polarized light through a quarter-wave plate at an angle of 45° to the optic axis of the plate.

How do you measure circularly polarized light?

Pass your CPL through a quarter wave plate followed by the rotating Polaroid. If there is complete extinction at two positions, then the incident beam is circularly polarized (this is so because a quarter wave plate will transform a circularly polarized light into a linearly polarized light).

What are the shapes used for microstrip patch antenna why?

A Microstrip Patch antenna for radar application is presented. There is a variety of shapes available for Microstrip patch antenna. In this paper, conventional shapes like Rectangular, Triangular and Circular Microstrip patch antenna are designed and analyzed. The antenna is designed to resonate at X-band frequency.