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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Substrate Integrated Monopulse Leaky Horn Antenna
AU - Segura-Gomez, Cleofas
AU - Wang, Lei
AU - Biedma-Perez, Andres
AU - Palomares-Caballero, Angel
AU - Padilla, Pablo
PY - 2025/7/2
Y1 - 2025/7/2
N2 - This paper presents a leaky horn antenna based on a substrate integrated waveguide (SIW) with monopulse performance. The proposed leaky horn antenna consists of two SIW leaky-wave antennas (LWAs) angularly separated to form the horn's flaring. By properly designing this angular separation taking into account the main radiation direction of both LWAs, a flat wavefront is achieved in the leaky horn aperture. To provide the monopulse behavior to the SIW leaky horn, a hybrid coupler, and phase shifters are included in the feeding. Depending on the input port chosen on the hybrid coupler, the LWAs forming the leaky horn are fed in phase or counter-phase and generate the sum and difference radiation patterns. A prototype has been fabricated to validate the design. In the operating band, an impedance matching below −13.9 dB is achieved at both input ports with an isolation between ports better than 16.6 dB. The measured radiation patterns show a monopulse behavior with a proper agreement with the simulated results. The proposed leaky horn presents a depth of −25.8 dB (difference between the sum diagram and the difference in the boresight axis), a peak realized gain of 12.9 dBi, and a half-power beamwidth of 6.4° at 27.5 GHz.
AB - This paper presents a leaky horn antenna based on a substrate integrated waveguide (SIW) with monopulse performance. The proposed leaky horn antenna consists of two SIW leaky-wave antennas (LWAs) angularly separated to form the horn's flaring. By properly designing this angular separation taking into account the main radiation direction of both LWAs, a flat wavefront is achieved in the leaky horn aperture. To provide the monopulse behavior to the SIW leaky horn, a hybrid coupler, and phase shifters are included in the feeding. Depending on the input port chosen on the hybrid coupler, the LWAs forming the leaky horn are fed in phase or counter-phase and generate the sum and difference radiation patterns. A prototype has been fabricated to validate the design. In the operating band, an impedance matching below −13.9 dB is achieved at both input ports with an isolation between ports better than 16.6 dB. The measured radiation patterns show a monopulse behavior with a proper agreement with the simulated results. The proposed leaky horn presents a depth of −25.8 dB (difference between the sum diagram and the difference in the boresight axis), a peak realized gain of 12.9 dBi, and a half-power beamwidth of 6.4° at 27.5 GHz.
KW - Horn antenna
KW - hybrid coupler
KW - leaky-wave antenna (LWA)
KW - monopulse antenna
KW - substrate integrated waveguide (SIW)
U2 - 10.1109/LAWP.2025.3585624
DO - 10.1109/LAWP.2025.3585624
M3 - Journal article
AN - SCOPUS:105009719018
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
SN - 1536-1225
ER -