RFI shielded enclosure for radio telescope receiver electronics

The paper presents the Radio Frequency Interference shielded enclosure design for electrical, electronics and computer network system housed in a radio quite zone of a radio observatory. The systems equipped at the antenna needs a multiple shielding and this paper presents the low cost and custom build shielded enclosure for the sub-systems placed at the antenna and central signal processing station of the observatory. Shielding requirements are of non-standard dimensions and needs a custom design to house the sub-system and at reduced cost. The designed RFI shielded enclosure offer > 74 dB isolation over (0.07-1.6 GHz) with all types of connector interface and cooling fans to avoid heating of the systems. The design is scalable to any non-standard sizes to shield UPS, Computers, Network components, communication equipment, air-conditioner units and lights used at radio observatory.