Electromagnetically transparent triband quad-polarization shared aperture cross dipole antenna design

Date

2024-11-26

Author

Çetin, Orhun

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

12
views

4
downloads

Cite This

A shared aperture triband antenna is designed and realized to be used in wireless communication applications. Antennas are designed based on frequency-selective surfaces, so that these antennas also have electromagnetically transparent surface characteristics. Hence they can be placed in the vicinity of each other in a shared-aperture form without affecting their radiation characteristics. The triband antenna includes three different antennas as follows: the low-frequency band antenna which is operated between 1 to 1.6 GHz, the middle-frequency band antenna which is operated between 1.8 to 2.9 GHz, which includes 2G/3G/4G communication bands, and the high- frequency band antenna which is operated between 3.3 to 5.5 GHz, which includes 5G communication bands. The low-frequency band antenna is added as a third antenna to observe the extendability of the shared-aperture antenna concept to serve more frequency bands. Firstly, electromagnetic transparent surfaces are designed and analyzed via ™HFSS program. Then cross dipole antennas are designed from the transparent surface and simulations are made for single antenna, shared-aperture antenna, and different polarizations. Finally, antenna prototypes are fabricated and measurement results are compared with the simulations. Results show that the designed antennas can provide slant +45° and -45° dual polarization as linear polarizations, and both left & right-hand circular polarizations by feeding with a 90° phase shift, for both single and multiband antenna cases.

Subject Keywords

Frequency selective surface, Cross dipole antenna, Shared aperture, Electromagnetically transparent, Quad-polarization

URI

https://hdl.handle.net/11511/112714

Collections

Graduate School of Natural and Applied Sciences, Thesis