Proximity Coupled Dual Antenna Design For X Band Applications
| Authors | B. Sivashanmugavalli , K. Indragandhi, R. Mahalakshmi, G. Kannan |
| Affiliations |
B.S. Abdur Rahman Crescent Institute of Science and Technology, Vandalore, Chennai, India |
| Е-mail | indra@crescent.education |
| Issue | Volume 18, Year 2026, Number 1 |
| Dates | Received 06 December 2025; revised manuscript received 21 February 2026; published online 25 February 2026 |
| Citation | B. Sivashanmugavalli, K. Indragandhi, R. Mahalakshmi, G. Kannan, J. Nano- Electron. Phys. 18 No 1, 01019 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(1).01019 |
| PACS Number(s) | 73.61.Jc, 71.20.Mq, 88.40.jj, 88.40.hj |
| Keywords | Dual antenna, Proximity Coupling, X-Band, Microstrip patch antenna, Dual resonance. |
| Annotation |
This paper presents the analysis and design of a proximity-coupled dual antenna for X-band applications. Proximity coupling, a widely used feeding technique, is employed to optimize the spatial allocation of the receiver antenna, resulting in a more compact and efficient antenna design. The proposed design consists of a simple dual-rectangular antenna, where one antenna is a rectangular microstrip patch resonating at 9.8 GHz, and the second antenna is fed by a microstrip line electromagnetically coupled with the radiating patch. The feed substrate increases the patch's height, contributing to improved performance in the proximity-coupled configuration. The dual antenna system consists of two antennas placed back-to-back, designed specifically for receiving and retransmitting signals. A coax-fed microstrip patch antenna and a microstrip line-fed patch are combined in this configuration. The substrate material used is FR4 epoxy. Despite the lossy nature of FR4, the dual antenna achieves a gain of 3 dB in both directions. The increased height of the overall antenna structure results in wide impedance bandwidth. The proposed design ensures efficient space utilization, making it a promising candidate for applications requiring compact, high-performance antennas. The results highlight the potential of this dual-antenna system for advanced wireless communication technologies. |
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