The PA series of antennas feature circular polarisation and are suitable for use with any standard 1575.42MHz GPS receiver. They all have a nominal 50Ohm output impedance and an output VSWR (Voltage Standing Wave Ratio) of less than 2:1. A choice of 12, 15, 17, 18 and 25mm square models makes it very easy for customers to select the optimum antenna for their particular application. When mounted on a suitable ground plane, the antennas have a gain between 1.5dBic and 3dBic. The optional fully integrated low noise amplifier, which is available for all PA series antennas, provides 26dB gain and operates from any voltage in the range 2.5 to 5Vdc; it also has a very low power consumption – just 75mw – making it ideal for battery-powered applications.
All standard PA series antennas are packaged as planar ceramic devices, designed for single through-hole board mounting. The amplified versions are available with a wide choice of cable lengths and connectors, including the sub-miniature U.FL or W.FL types. For customers ordering production quantities, CTi also offers a fine-tuning service which allows the antenna’s 1575.42MHz centre frequency to be shifted slightly, to compensate for any proximity effects of the end-product’s housing and other circuitry.