This work demonstrates the sensitivity of lens antenna arrays operating at millimeter-wave (mmWave) frequencies. Considering a Rotman lens array in receive mode, our investigation focuses on its most imperative defect: aberration of electromagnetic (EM) energy. Aberration leads to spillover of electric fields to neighboring ports, reducing the lens’ ability to focus the EM energy to a desired port. With full EM simulations, we design a 28 GHz, 13 beam and 13 array port Rotman lens array to characterize its performance with the aforementioned impairment. Our findings show that the impact of aberration is more pronounced when the beam angles are close to the array end-fire. More critically, the corresponding impact of aberration on the desired signal and interference powers is also investigated for an uplink multiuser cellular system operating at 28 GHz. The presented results can be used as a reference to re-calibrate our expectations for Rotman lens arrays at mmWave frequencies.
|Title of host publication||IEEE MTT-S International Microwave Workshop Series on 5G Hardware and System Technology (IMWS-5G)|
|Place of Publication||Dublin, Ireland|
|Number of pages||3|
|Publication status||Early online date - 08 Oct 2018|
|Event||IEEE MTT-S International Microwave Workshop Series on 5G Hardware and System Technologies (IMWS-5G) 2018 - University College Dublin , Dublin, Ireland|
Duration: 30 Aug 2018 → 31 Aug 2018
|Conference||IEEE MTT-S International Microwave Workshop Series on 5G Hardware and System Technologies (IMWS-5G) 2018|
|Abbreviated title||IMWS-5G 2018|
|Period||30/08/2018 → 31/08/2018|
- Lens arrays
- Spillover losses
- Millimeter Wave
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Abbasi, M. A. B. (Creator), Queen's University Belfast, 04 Mar 2019