Dual S- and X-Band Shared Aperture Antenna for Nano-Satellite Applications

Serup, Daniel E.; Williams, Robin Jess; Zhang, Shuai; Pedersen, Gert Frølund

doi:10.23919/eucap51087.2021.9411373

Cited by 7 publications

(1 citation statement)

References 8 publications

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“…In [10], a technique to achieve high isolation level up to 30 dB is presented using the differential feed network with large aperture size and high gain variation within L/X-band respectively. In [11] and [12], optimization techniques for achieving high inter-band isolation in multilayer SAA structures are proposed however the resulting height of antennas is large. In this work, a simple and systematic approach is adopted to design the proposed dual-band SAA array for both X and Kuband operations.…”

Section: Introductionmentioning

confidence: 99%

A Compact and High Gain X/Ku Band Shared Aperture Antenna Array With Enhanced Inter-Band and Cross-Band Isolation

Ali,

Nabeel Awan,

Ahmad Malik

et al. 2024

IEEE Access

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This paper introduces a dual-band shared-aperture antenna (SAA) designed to operate in both X and Ku-bands. The approach begins with the initial design and optimization of X-band and Ku-band antenna arrays on separate apertures. Subsequently, these arrays are integrated onto a single aperture to create a shared-aperture antenna array. For the X-Band, a single-port 4×1 element array is designed using a seriesfed network. This configuration is later upgraded to a four-port 4×4 element array to enhance gain. The interelement spacing is optimized at 19.1 mm to accommodate Ku-band array elements. The Ku-Band antenna array employs an aperture-coupled feeding technique with a corporate feed network, maintaining a consistent inter-element spacing of 19.1 mm. Both 4×4 element antenna arrays for X and Ku-bands, configured with multi-ports and single-port networks, are fabricated on a single aperture while maintaining an overall size of 114×96×1.6 mm 3 . Performance analysis of both the configurations i.e. Multiport Shared Aperture Antenna (MPSAA) Array and Single Port Shared Aperture Antenna (SPSAA) array is conducted. The achieved gains are 13.1/13.4 dBi for MPSAA and 18.5/19.1 dBi for SPSAA in both respective X/Ku bands, while maintaining a Side Lobe Level (SLL) of -9 dB and -10 dB. In addition, the measured results indicate significant inter-band and cross-band isolation, surpassing 25/35 dB (for X/Ku band) and 35 dB for MPSAA and crossband of >40 dB for SPSAA, respectively. The return loss bandwidth in the case of MPSAA for X/Ku-band is measured at 350/900 MHz, with resonance between 10.0-10.35 GHz and 13.0-13.9 GHz, respectively. The design utilizes Rogers RT/Duroid-5880 with a 0.79 mm thickness as the substrate. Simulation and measured results show good agreement. The compact size, high gain, and exceptional inter-/cross-band isolation make this design suitable for integration into modern communication systems and beamforming applications.INDEX TERMS Aperture antennas, dual band, shared aperture.

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Section: Introductionmentioning

confidence: 99%

A Compact and High Gain X/Ku Band Shared Aperture Antenna Array With Enhanced Inter-Band and Cross-Band Isolation

Ali,

Nabeel Awan,

Ahmad Malik

et al. 2024

IEEE Access

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Circularly Polarized Electromagnetically Controlled Beam-Steerable mm-wave Reflectarray Antenna

Serup,

Aghabeyki,

Zhang

et al. 2024

2024 IEEE International Workshop on Antenna Technology (iWAT)

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Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

Serup

Pedersen

Zhang

2022

IEEE Open J. Antennas Propag.

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In this paper, a dual-band antenna at 4.5 GHz and 25 GHz is presented. The antenna is a low-frequency phased patch antenna array combined with a high-frequency transmitarray with a fixed beam. The lowfrequency patch antenna array and the high-frequency transmitarray feed share the same aperture area. The high-frequency transmitarray surface only uses a single substrate layer and is electrically transparent to the low-frequency phased array with beamforming. The antenna is measured to achieve an impedance bandwidth of 350 MHz and 3 GHz, and a gain of 15.4 dBi and 23.5 dBi, at S-and K-band respectively. With an impressive frequency-ratio of 5.55 and an aperture area of only 12x12cm the antenna achieves an aperture efficiency of 66% and 15% in the two bands respectively. Additionally, the low-frequency beamforming capabilities (with the existence of transmitarray surface) are measured and the antenna is shown to have a 60-degree scanning range with only a 0.22 dB gain drop-off.

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Dual S- and X-Band Shared Aperture Antenna for Nano-Satellite Applications

Cited by 7 publications

References 8 publications

A Compact and High Gain X/Ku Band Shared Aperture Antenna Array With Enhanced Inter-Band and Cross-Band Isolation

A Compact and High Gain X/Ku Band Shared Aperture Antenna Array With Enhanced Inter-Band and Cross-Band Isolation

Circularly Polarized Electromagnetically Controlled Beam-Steerable mm-wave Reflectarray Antenna

Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

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