Publisher DOI: 10.1017/S1759078721000404
Title: A compact low-noise frontend for interleaved Rx/Tx arrays at K-/Ka-Band
Language: English
Authors: Sieganschin, Anton 
Jaschke, Thomas  
Jacob, Arne 
Keywords: frontend; full-duplex; K-band, Ka-band; low noise; phased array; Rx/Tx-integration; Satellite communication (SatCom)
Issue Date: Jul-2021
Source: International Journal of Microwave and Wireless Technologies 13 (6): 595-601 (2021-07)
Abstract (english): 
This contribution deals with a frontend for interleaved receive (Rx)-/transmit (Tx)-integrated phased arrays at K-/Ka-band. The circuit is realized in printed circuit board technology and feeds dual-band Rx/Tx- and single-band Tx-antenna elements. The dual-band element feed is composed of a substrate-integrated waveguide (SIW) diplexer with low insertion loss, a low-noise amplifier (LNA), a bandpass filter, and several passive transitions. The compression properties of the LNA are identified through two-tone measurements. The results dictate the maximum allowable output power of the power amplifier. The single band feed consists of a SIW with several transitions. Simulation and measurement results of the individual components are presented. The frontend is assembled and measured. It exhibits an Rx noise figure of 2 dB, a Tx insertion loss of ~ 2.9 dB, and an Rx/Tx-isolation of 70 dB. The setup represents the unit cell of a full array and thus complies with the required half-wave spacing at both Rx and Tx.
ISSN: 1759-0787
Journal: International journal of microwave and wireless technologies 
Institute: Hochfrequenztechnik E-3 
Document Type: Article
Project: Elektronisch schwenkbare Planarantenne für mobile Satelittenkommunikation im Flugzeug - SANTANA-Aero 
Elektronisch schwenkbare Planarantennen für mobile Satellitenkommunikation im Flugzeug - SANTANA-Aero II 
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