English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This report presents a down-conversion method involving digital sidebandseparation for the Yuan Tseh Lee Array to double the processing bandwidth. Thereceiver consists of a MMIC HEMT LNA frontend operating at a wavelength of 3mm, and sub-harmonic mixers that output signals at intermediate frequencies of2 - 18 GHz. The sideband separation scheme involves an analog 90 degree hybridfollowed by two mixers that provide down conversion of the IF signal to a pairof in phase (I) and quadrature (Q) signals in baseband. The I and Q basebandsignals are digitized using 5 Giga sample per second analog to digitalconverters. A second hybrid is digitally implemented using field programmablegate arrays to produce two sidebands, each with a bandwidth of 1.6 GHz. The 2 x1.6 GHz band can be tuned to cover any 3.2 GHz window within the aforementionedIF range of the array. Sideband rejection ratios (SRRs) above 20 dB can beobtained across the 3.2 GHz bandwidth by equalizing the power and delay betweenthe I and Q baseband signals. Furthermore, SRRs above 30 dB can be achievedwhen calibration is applied.

Development of digital sideband separating down-conversion for Yuan-Tseh Lee Array