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A 70 – 450 MHz field-deployable ultra-wideband antenna has been developed for use in characterizing proposed antenna element arrays for the Square Kilometre Array (SKA) project. We describe the construction technique and measurements demonstrating its suitability as a reference antenna.
The SKA is a next generation radio telescope employing phased aperture arrays at its lowest operating band (SKA-low) of 70–450 MHz. SKA-low is a dual-polarized array consisting of antenna elements with stable impedance and low cross-polarization. We select the well-known broadband conical spiral antenna and its dual-polarized derivative to be evaluated as candidate elements for SKA-low. Previously,...
Aperture Arrays (AA) mark a new era in radio astronomy combining high sensitivity with a large field-of-view, enabling very high survey and imaging speeds. This paper describes the development of low frequency aperture arrays leading up to SKA phase 1 within the Aperture Array Verification Program (AAVP) as part of the SKA program.
The Square Kilometre Array (SKA) will be the largest radio telescope ever built operating at multiple frequency bands. The lowest band, SKA-low, covers 70–450 MHz and consists of sparse aperture arrays. The International Centre for Radio Astronomy Research (ICRAR) is investigating conical spirals as one candidate antenna for SKA-low. These large (∼1 m) low frequency antennas are characterized using...
The Square Kilometre Array (SKA) will be the most sensitive radio telescope ever built. It is divided into three operating bands. Sparse aperture arrays (SKA-low) are used at the lowest operating band of 70 – 450 MHz. The International Centre for Radio Astronomy (ICRAR) is exploring conical spiral antennas as one candidate antenna design for SKA-low. One of the attractive features of the conical spiral...
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