DEVELOPMENT OF NbN TERAHERTZ HEB MIXERS COUPLED THROUGH SLOT-RING ANTENNAS.
Eyal Gerecht, Dazhen Gu, Xin Zhao, John Nicholson, Fernando R. Morales, Sigfrid Yngvessen
In order to improve the power coupling to Phonon-Cooled Hot Electron Bolometric (PHEB)devices, we are experimenting with a different type of antenna. The goal of the project is to eliminate the need for a beam splitter or diplexer and to couple both the local oscillator beam and the signal beam directly to the antenna. This direct coupling can be done by fixing the polarization of the local oscillator and signal beams to be orthogonal to each other. The slot-ring antenna has been used successfully at millimeter wave frequencies, up to 94 GHz, integrated with Schottky barrier diodes. It can be easily coupled to a dielectric lens since it has a roughly symmetric radiation pattern. We have designed slot-ring antennas centered at 1.6 THz. Slot-ring antennas are well suited for use with terahertz Phonon-Cooled Hot Electron (PHEB). A coplanar waveguide(CPW) stub filter, which presents an open circuit at the slot-ring, is used. The coplanar waveguide(CPW) requires air bridges (well-known in MMIC technology at lower frequencies) in order to ensure that ony the main coplanar waveguide mode can propagate. Although slot-ring antennas have been used sucessfully at much lower frequencies, they present a challenge at terahertz frequencies.
April 27-29, 2004
NORTHAMPTON, MA, USA
15TH INTERNATIONAL SYMPOSIUM ON SPACE TERAHERTZ TECHNOLOGY
terahertz receivers, hot electron bolometers, superconducting mixers, terathertz antennas.
, Gu, D.
, Zhao, X.
, Nicholson, J.
, Morales, F.
and Yngvessen, S.
DEVELOPMENT OF NbN TERAHERTZ HEB MIXERS COUPLED THROUGH SLOT-RING ANTENNAS., 15TH INTERNATIONAL SYMPOSIUM ON SPACE TERAHERTZ TECHNOLOGY, NORTHAMPTON, MA, USA
(Accessed September 26, 2023)