The balanced mixer is fabricated on a 2 x 1 mm quartz substrate which contains an RF quadrature hybrid and two SIS mixers. These components are realized in capacitively-loaded coplanar waveguide, which minimizes stray coupling between adjacent components and coupling to undesired modes in the thick quartz substrate. Signal and LO waveguides are coupled to separate ports of the main substrate vi...

An integrated microdevice, consisting of a micropump, a passive mixer, a magnetic separation chamber, and a microcapillary electrophoretic channel, was constructed for biobarcode assay based multiplex biological agent detection in a sample-to-answer-out manner within 30 min with high sensitivity.

We present here the first measurement results of a 1200 GHz heterodyne receiver front-end prototype based on this Schottky GaAs membrane technology. The 1200 GHz subharmonic mixer design, previously reported, uses a suspended MMIC GaAs membrane that feature a balanced pair of planar Schottky diodes and an on-chip MIM capacitor for DC forward biasing capabilities. The possibility to bias the sub...

We present a low noise SIS mixer developed for the 1.2 THz band of the heterodyne spectrometer of the Herschel Space Observatory. The device of this design will be among the first SIS mixers flown in space at Herschel. The developed SIS mixer has a quasi-optical design, with a double slot planar antenna and an extended spherical lens made of pure Si. The SIS junctions are Nb/AlN/NbTiN with the ...

In this paper, a 1.2-V RF front-end realized for the personal communications services (PCS) direct conversion receiver is presented. The RF front-end comprises a low-noise amplifier (LNA), quadrature mixers, and active RC low-pass filters with gain control. Quadrature local oscillator (LO) signals are generated on chip by a double-frequency voltage-controlled oscillator (VCO) and frequency divi...