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This paper deals with a 3 dB Ku-band coupler designed in substrate integrated waveguide (SIW) technology. A microstrip-SIW-transition is designed with a return loss (RL) greater than 20 dB. Rogers 4003 substrate is used for the SIW with a gold plated copper metallisation. The coupler achieves a relative bandwidth of 26.1% with an insertion loss (IL) lower than 2 dB, coupling balance smaller than 0...
A method of moments combined with mode matching technique is applied to analyze the shielded coupled strip and slot line structures containing a thin plate of Ω pseudochiral medium. The boundary problems are simplified by introducing for Ω-medium the approximate continuity conditions. Such mathematical model allows to examine the field displacement effect appearing in the considered guide resulting...
This paper describes a prototype of a LTCC microwave-microfluidic reactor, which was built to test a possibility of accelerating chemical reactions. The authors put their focus on conditions that must be met to assure reliable assessment of power that is delivered to the reactor, and which is used to stimulate a chemical reaction.
This paper describes a hybrid microwave integrated circuit (MIC) power amplifier (PA) covering the extended Ku-band uplink (13.75 – 14.5 GHz) for satellite communication. A high relative permittivity alumina substrate and a 250nm GaN bare-die technology have been chosen realizing the amplifier. The designed PA was characterized in its small- and large-signal behavior. The measured device performance...
Classical Series-Shunt and T-shape SPDTs provide an isolation degrading in frequency which, to be adequately counteracted, may require high-value (and, therefore, large-size) resonating inductors. In this contribution, a resistive bias network is added to a T-shape SPDT instead of introducing inductors. A derived analytical description evidences that the maximum isolation can be shifted in frequency...
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