A 1 × 2 Low-Profile Filtering Antenna Array Using Strip Dense Dielectric Patch.

Area of Science:

• Electromagnetics and Antenna Engineering
• Microwave Engineering
• Materials Science for RF Applications

Background:

• Filtering antenna arrays are crucial for modern wireless communication systems, demanding compact and efficient designs.
• Traditional designs often suffer from complexity due to power distribution networks and limited bandwidth.
• Dielectric resonator antennas offer potential for miniaturization but require innovative feeding and filtering mechanisms.

Purpose of the Study:

• To propose and validate a novel 1x2 low-profile filtering antenna array.
• To demonstrate a simplified feeding network using an H-shape resonator.
• To achieve wide bandwidth and a sharp upper-edge radiation null in the filtering response.

Main Methods:

• Utilizing an H-shape resonator to feed two strip dense dielectric patch (DDP) resonators.
• Exploiting the even-odd and odd-odd modes of the H-shape resonator in conjunction with TM modes of DDP resonators.
• Fabricating and testing a prototype antenna operating at 4.9 GHz.

Main Results:

• The proposed antenna achieves a 10 dB impedance matching bandwidth of 7.1%.
• A maximum gain of 8.6 dBi was recorded.
• The antenna exhibits a compact size of 1.29 × 0.18 × 0.038 λ0, with a simplified structure and no traditional power division network.

Conclusions:

• The H-shape resonator effectively integrates feeding and filtering functions, reducing antenna array complexity.
• The proposed design offers a low-profile, compact, and wide-bandwidth filtering antenna solution.
• This approach presents an advantageous alternative to existing dielectric filtering antenna designs.