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Shanghai institute of applied physics (siap), Chinese academy of sciences (cas) and xst join hands to build a top-notch high-performance shortwave receiver

2025-02-24

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High Performance Shortwave Receivers
Ultra shortwave receivers
Variable Frequency Components

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I. Background and Introduction
Shanghai Institute of Applied Physics (SIAP) of the Chinese Academy of Sciences (CAS) is an important research institute in the field of nuclear science and technology, with the ‘Key Laboratory of Microinterface Physics and Detection of the Chinese Academy of Sciences (CAS)’, ‘Shanghai Key Laboratory of Cryogenic Superconducting and High-Frequency Cavity Technology’ and ‘Shanghai Key Laboratory of Cryogenic Superconducting and High Frequency Cavity Technology’. Shanghai Key Laboratory of Low Temperature Superconducting High Frequency Cavity Technology’. The inverter components developed in this cooperation will be applied to the superconducting linear accelerators of the above laboratories, which will provide an important solution for the applied research of nuclear technology.
II. Co-operation Mode and Mechanism
In the course of co-operation, both parties have maintained close communication and collaboration. Through regular meetings, progress reports and on-site exchanges, both parties ensure that every technical detail is accurately understood and recognised. This efficient communication mechanism not only accelerates the product development progress, but also improves the quality and performance of the products.
III. Synthesis Technology and Achievements
The high-performance shortwave receiver customised by XST for ASTRI has wide frequency coverage (capable of receiving shortwave signals of multiple frequency bands), strong demodulation capability (no matter it is amplitude modulation (AM), frequency modulation (FM) or single-sideband modulation (SSB), the shortwave receiver can demodulate it efficiently and recover the original information content), and strong adaptability (adaptable to shortwave signal propagation characteristics under different weather conditions and time periods). (able to adapt to different weather conditions and time periods of the short-wave signal propagation characteristics) and other technical features and advantages.
Since XST's short-wave receivers have been put into the laboratory, they have won the unanimous good reputation of customers with their excellent performance and high cost performance, and have promoted the innovation and development of nuclear science and technology, making important contributions to the scientific and technological progress and national defence construction of the country.

Product Features Parameter Index requirements
• Product Features
• Fast scanning
• Compact size
• High stability
• High sensitivity
Receiving frequency range 0.1MHz ~ 30MHz
Phase Noise ≤ -110dBc/Hz@10kHz
Synthesiser switching time ≤ 500μs
Noise Figure ≤ 9dB
Applications Input second order intercept ≥ 70dBm
• Wireless signal reception
• Radio monitoring, reconnaissance and radio
• spectrum management
• Shortwave Communication Test Instruments
• Shortwave communications signal analyser
• Safety and security monitoring and listening
Output third order intercept point ≥ 30dBm
Mirror frequency rejection 115dB
IF rejection ≥ 115dB
IF Frequency 70MHz
Internal spurious signal ≤ -110dBm
IF Bandwidth 2MHz、30kHz

 

Main technical indicators of the product Main technical indicators of the product Main technical indicators of the product
1、 Frequency characteristics 2、 Dynamic, sensitivity, and false signal suppression 3、 Intermediate frequency characteristics
Indicator Name minimum typical maximum unite remarks Indicator Name minimum typical maximum unite remarks Indicator Name minimum typical maximum unite remarks
Receiver frequency range 0.1   30 MHz   Noise coefficient 59 9   dB Full gain test Intermediate frequency   70   MHz  
Minimum frequency step of synthesizer   1   kHz   Link gain 55 60 61 dB Broadband mode 3dB bandwidth 2     MHz Broadband mode
Synthesizer switching time     500 μs     56 57 dB Narrowband mode 30     kHz Narrowband mode
phase noise   -110 dBc/Hz @10kH   Maximum RF attenuation   56   dB 1dB Stepping 2MHz Bandwidth rectangular coefficient     3   BW-60dB/BW-3dB
A/D Clock output frequency   100   MHz   Maximum intermediate frequency attenuation   30   dB 1dB Stepping 30kHz Bandwidth rectangular coefficient     3   BW-60dB/BW-3dB
Reference source frequency stability     ±0.1 ppm Built in reference source Enter second-order intercept point   30   dB Full gain test In band fluctuation of intermediate frequency output     1 dB normal atmospheric temperature
Frequency fine-tuning range   ±2   ppm Factory calibration Output third-order cutoff point within the band   70   dB Full gain test Intermediate frequency output 1dB compression point 16     dBm  
            Mirror frequency suppression   30   dB   IF Output Impedance   50   Ω  
            If Rejection   115   dB              
            Internal false signals   -120 -110 dBm Converted to the input end, full gain measurement            
            RF input matching impedance   50   Ω