4.7 Article

Pattern Reshaping of the Third Resonant Mode of Dipole and Slot Using Parasitic Elements

Journal

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 71, Issue 8, Pages 6941-6946

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2023.3270459

Keywords

Dipole antenna; parasitic element; pattern reshaping; slot antenna

Ask authors/readers for more resources

A simple approach is proposed to reshape the radiation patterns of the third mode of dipole and slot antennas by adding short parasitic strips or slots to both sides of the antennas. The reversed current or E-field in the third mode is canceled out by the induced current or E-field on the added parasitic elements, resulting in reshaped omnidirectional or bidirectional radiation patterns. The effects of parasitic element length, spacing, and position on radiation patterns have also been studied. Two prototypes with parasitic elements were fabricated and tested, validating the concept with good agreement between measured and simulated results.
A simple approach for radiation pattern reshaping of the third mode of dipole and slot antennas is proposed. Short parasitic strips or slots are added to both sides of the dipole or slot antenna. In the third mode, the reversed current or E-field will destroy the omnidirectivity or bidirectivity of these two antennas. But, the induced current or E-field on the parasitic elements is opposite to that on the original antenna canceling the effect of the reversed current or E-field. As a result, the radiation patterns of the dipole and slot in the third mode are reshaped to be omnidirectional or bidirectional, respectively. The effects of parasitic element length, spacing, and position on radiation patterns have also been studied. Besides, it is proved that parasitic loops have the same effect. For simplifying impedance matching, a novel feeding method for slot antenna is designed especially without using lumped elements. Two prototypes, dipole and slot antennas with parasitic elements, were fabricated and tested to validate the concept. The measured results are in good agreement with the simulated ones. The measured patterns of the third mode are shaped with lower sidelobes and high realized gains. In both the first and third modes, the dipole and slot antennas realize omnidirectional and bidirectional radiations, respectively.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available