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Analysis of 4-way divider MMICs in GaAs technology for H-band applications

: Amado-Rey, Belén; Campos-Roca, Yolanda; Friesicke, Christian; Raay, Friedbert van; Massler, Hermann; Leuther, Arnulf; Ambacher, Oliver


Institute of Electrical and Electronics Engineers -IEEE-:
11th German Microwave Conference, GeMiC 2018 : Riding the green waves, 12-14 March 2018, Freiburg, Germany
Piscataway, NJ: IEEE, 2018
ISBN: 978-3-9812668-8-7
ISBN: 978-1-5386-3740-1
German Microwave Conference (GeMiC) <11, 2018, Freiburg>
Fraunhofer IAF ()
Dolph–Chebyshev; Wilkinson power divider / combiner; millimeter-wave monolithic integrated circuit (MMIC); grounded coplanar waveguide (GCPW)

A 4-way Wilkinson and a 4:1 Dolph-Chebyshev divider MMIC based on grounded coplanar waveguide technology on GaAs are presented, analyzed and compared. The Dolph-Chebyshev structure was simulated by using electromagnetic software, whereas the 4-way Wilkinson divider was simulated by a schematic CAD tool. Both dividers are processed and experimentally evaluated for operation in H-band (220-330 GHz).The 4-way Wilkinson MMIC achieves the best insertion losses, which are lower than 1.07 dB between 235 and 255 GHz (8.2 % of relative bandwidth, RBW). Input return losses better than 12 dB, an amplitude imbalance between outer and inner branches lower than 0.7 dB and a phase difference of (1.5 ± 0.1)◦ is achieved by the Dolph-Chebyshev from 235 to 257 GHz (RBW=8.9 %).The 4-way Wilkinson divider is very compact with a size of 0.09 × 0.22 mm2.