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Author
Meledin D.
;
Pantaleev M.
;
Pavolotsky A.
;
Risacher C.
;
Robles V.A.P.
;
Belitsky V.
;
Drakinskiy V.
;
Cherednichenko S.
Title
Design of a balanced waveguide HEB mixer for APEX 1.32 THz receiver
Type
Conference Article
Year
2004
Publication
Proc. 15
th
Int. Symp. Space Terahertz Technol.
Abbreviated Journal
Volume
Issue
Pages
211-217
Keywords
Abstract
The prototype of a waveguide balanced Hot Electron Bolometer (HEB) Terahertz mixer is designed as a part of development for the APEX Project of Band T2 receiver for 1250-1390 GHz. The proposed mixer employs balanced scheme with two identical HEB devices. These individual mixers would be placed on two separate crystalline quartz substrates with dimensions of 1000μm x67μm x17 μm each with integrated RF choke filters, DC-bias and IF circuitry. A 3 dB quadrature waveguide directional coupler is needed to provide local oscillator (LO) injection and RF signal distribution between the two HEB mixers. We have designed the coupler to achieve the required frequency band, low insertion loss and symmetrical division of the RF and LO power within the band of interest. Initial design of HEB mixer layout is developed based on a previous development for a 345 GHz sideband separation mixer. We present also results of development of microfabrication technology of the waveguide hybrid employing micromachining approach combined with electroplating technique.
Address
Corporate Author
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Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
Approved
no
Call Number
RPLAB @ atomics90 @
Serial
972
Permanent link to this record
Author
Meledin D.
;
Desmaris V.
;
Ferm S.-E.
;
Fredrixon M.
;
Henke D.
;
Lapkin I.
;
Nyström O.
;
Pantaleev M.
;
Pavolotsky A.
;
Strandberg M.
;
Sundin E.
;
Belitsky V.
Title
APEX Band T2: A 1.25 – 1.39 THz Waveguide Balanced HEB Receiver
Type
Journal Article
Year
2008
Publication
Abbreviated Journal
Volume
Issue
Pages
181-185
Keywords
Abstract
A waveguide 1.25–1.39 THz Hot Electron Bolometer (HEB) balanced receiver was successfully developed, characterized and installed at the Atacama Pathfinder EXperiment (APEX) telescope. The receiver employs a quadrature balanced scheme using a waveguide 90-degree 3 dB RF hybrid, HEB mixers and a 180-degree IF hybrid. The HEB mixers are based on ultrathin NbN film deposited on crystalline quartz with a MgO buffer layer. Integrated into the multi-channel APEX facility receiver (SHeFI), the results presented here demonstrate exceptional performance; a receiver noise temperature of 1000 K measured at the telescope at the center of the receiver IF band 2-4 GHz, and at an LO frequency of 1294 GHz. Stability of the receiver is fully in line with the SIS mixer bands of the SHeFI, and gives a spectroscopic Allan time of more than 200 s with a noise bandwidth of 1 MHz.
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Series Issue
Edition
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ISBN
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no
Call Number
RPLAB @ atomics90 @
Serial
974
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