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Conference Paper
KA-BAND 8-CHANNEL RECEIVE BEAMFORMING IC FOR SATELLITE COMMUNICATION
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- Authors
- Junhan Lim, Seong-Mo Moon, Dong-Pil Chang, Byoung-Sun Lee, Jin-Seok Park
- Issue Date
- 2023-10
- Citation
- Ka and Broadband Communications Conference 2023, pp.1-7
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper describes a Ka-Band 8-channel receive beamforming front-end IC with variable gain phase shifter based on a Gilbert-cell vector synthesizer with a designed current digital-to-analogue converter (DAC) is presented, which has an I/Q generator with an RC–LR polyphase filter to reduce the insertion loss. Circuit techniques are presented to have higher performance with smaller chip size, and lower power consumption. Orthogonal phase and gain control in a single block are firstly achieved using the proposed dual-vector synthesis technique, which greatly reduces chip size and power consumption. It has 30 dB gain dynamic range and 6-bit phase control step all over 360°. For combining the 8 different channels into a single stream, highly optimized 4:1 and 2:1 combiners are adapted. It shows a measured RMS phase error of 1.6° and RMS amplitude error of 0.15 dB over 18 – 21 GHz, while 15 dB gain varying and 360° phase shifting. It has 27 dB coherent gain and 2.9 dB coherent Noise Figure. The proposed dual pole 4CH beamforming IC was implemented in a 0.18-um SiGe BiCMOS technology with the chip size of 3.8 mm x 3.0 mm. A single channel consumes about 33 mA on 3.3 V supply voltage.
- KSP Keywords
- 3 V, Amplitude error, Coherent noise, Front-End, Gain Control, Gilbert-cell, Higher performance, Lower power, Noise Figure(NF), Phase Shifter, Phase control