Dispersion-Engineered Transmission Line Loaded Slot Antenna for UWB Applications

• Published in: IEEE antennas and wireless propagation letters Vol. 18; no. 2; pp. 323 - 327
• Main Authors: Paul, Princy Maria, Kandasamy, Krishnamoorthy, Sharawi, Mohammad S., Majumder, Basudev
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna design; Antenna measurements; Antennas; Bandwidth; Bandwidths; Broadband; Circuit design; Dispersion; Equivalent circuits; Loaded antennas; Microstrip; Microstrip transmission lines; multiband; Performance measurement; periodic structures; Resonant frequency; slot antenna; Slot antennas; Substrates; Transmission lines; Ultra wideband antennas; Ultrawideband
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2018.2889931

A transmission line (TL) loaded, compact, ultrawideband (UWB) square slot antenna is proposed in this letter. The square slot is a microstrip line fed and loaded with an array of periodically perturbed TLs to achieve a UWB response from 2.1 to 11.5 GHz. The slot is designed to resonate at 2.6 GHz. The TLs are dispersion engineered to resonate at several frequencies so as to provide a wideband response. Loading of the engineered TLs on the square slot produced multiple resonances without affecting the fundamental mode of the slot antenna. The proposed antenna design is analyzed using dispersion relations and equivalent circuits. The proposed antenna is fabricated on an RT/Duroid 5880 substrate with a size of 50 × 50 × 1.52 mm 3 . The antenna performance metrics, such as impedance bandwidth, gain, and efficiency, are experimentally verified. Good agreement is obtained between simulated and measured results.