::: Sitemap Chinese Version中文 PrintPrint Friendly search help
People > Engineering Staff > Curriculum Vita
This photo represents the first production in-phase/quadrature down converter designed for the YTLA project as an upgrade to the AMiBA analog correlator system. The design was based on the results of a prototype development conducted the previous year.
In-Phase/Quadrature Down Converter Production Bracket, YTLA Project
This is a photo of the YTLA clock distribution drawer packaged in a standard rack mount 2U height EMI chassis.
Clock Distribution Chassis, YTLA Project
A down-conversion method involving digital sideband separation is adopted for the Yuan-Tseh Lee Array (YTLA) to double the processing bandwidth. The sideband separation scheme includes an analog 90° hybrid followed by two mixers that provide down-conversion of the IF signal to a pair of in-phase (I) and quadrature (Q) signals in baseband. The I and Q baseband signals are digitized using 5 Giga sample per second (Gsps) analog-to-digital converters (ADCs). A second hybrid is digitally implemented using field-programmable gate arrays (FPGAs) to produce two sidebands, each with a bandwidth of 1.6 GHz. The 2 × 1.6 GHz band can be tuned to cover any 3.2 GHz window within the 2-18 GHz IF of the array. Sideband rejection ratios (SRRs) above 30 dB can be achieved when calibration is applied.
Digital sideband separating down-conversion for YTLA
Cheng, Jen-Chieh
Engineer
photo of Cheng, Jen-Chieh
Office: ASMAB 1026
TEL: +886-2-2366-5365
FAX: +886-2-2367-7849
Email: jccheng_replace2@_asiaa.sinica.edu.tw

Research Interests

Electrical Engineering

Journal Papers affiliated with ASIAA

  1. Lin H-H; Lin K-Y; Li C-T; Tseng Y-H; Jiang H; Wang J-H; Cheng J-C; Pen U-L; Chen M-T; Chen P; Chen Y; Goto T; Hashimoto T; Hwang Y-J; King S-K; Kubo D; Kuo C-Y; Mills A; Nam J; Oshiro P; Shen C-S; Tseng H-C; Wang S-H; Feng-Shun Wu V; Bower G; Chang S-H; Chen P-A; Chen Y-C; Chiang Y-K; Fedynitch A; Gusinskaia N; Ho SCC; Hsiao TYY; Hu C-P; Huang Y D; Jauregui Garcia JM; Kim SJ; Kuo C-Y; Fang-Jie Ling D; On AYL; Peterson JB; Raquel BJR; Su S-C; Uno Y; Wu CKW; Yamasaki S; Zhu H-M, "BURSTT: Bustling Universe Radio Survey Telescope in Taiwan" , PASP: 134(1039), id.094106 (14pp), Sep, 2022 [SCI] ( ADS | Fulltext )
Page Top
TEL: 886-2-3365-2200 FAX: 886-2-2367-7849
General: asiaa_replace2@_asiaa.sinica.edu.tw Media Request: epo_replace2@_asiaa.sinica.edu.tw
11F of AS/NTU Astronomy-Mathematics Building, No.1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan, R.O.C.