Year: 2026
Type: article
Abstract: This article presents the designs of simple dual-slot L-shaped microstrip antennas with coaxial-feeding that require only two cuts of slot, operating at frequencies of 0.7 GHz, 2.1 GHz, and 3.5 GHz, which align with the fifth-generation (5G) new radio (NR) frequency bands n28, n1, and n78, respectively. These antennas are designed to support low- and mid-band 5G applications while accommodating demand for simple and low-profile designs. All rectangular microstrip antennas have been designed using a fundamental microstrip formula, followed by modifications to ensure optimal performance by integrating rectangular slots on the radiating patch and variably shaped slots on the ground plane to improve the reflection coefficient, S 11, gain, and efficiency, with varying effects across frequencies. The proposed microstrip antennas yield S 11 less than − 10 dB, approximately 2 dB gain, and efficiency surpassing 50%. Meanwhile, the validation measurements show a minimum S 11 of − 18.7 dB at 0.7 GHz and a maximum gain of 2.4 dB at 3.5 GHz. All designs are simulated and analyzed in CST Microwave Studio using the Rogers RT/Duroid 5880 substrate, prior to the validation via a vector network analyzer and an anechoic chamber.
Source: Scientific Reports
Institution: University of Technology Malaysia
Language: English
Topic: Antenna Design and Analysis
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Award: G2830713828
OpenAlex ID: W7155012399