20-27 & 20- 27EC
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L1 & L2 Low Profile GPS Antenna with PTFE cover ELECTRICAL Frequency Range L1: 1565-1585 Polarisation Right Hand Circular Polarised <2 dB axial ratio on boresight (Return Loss) Power Survival Capable of withstanding signals of 200 V/m CW, 50 kHz to 40 GHz without sustaining damage L1 L2 LI and L2 coverage ■ Low profile ■ PTFE (Teflon) gives excellent de-icing performance O=<0<=75 75<e<=80 8O<0<=85 85<0<=9O Centre Band band edge Centre Band edge The 20-27 and 20-27EC Series GPS antennas are designed to provide operation at both the L1 and L2 frequencies. They are of low profile construction and are supplied with a high performance PTFE (Teflon) cover. The antennas are designed for use on greater than 300 mm diameter metallic groundplanes. For all other groundplanes use type 20-27F Series. A circular aluminium alloy baseplate forms the platform onto which is attached the antenna radiating elements and radome. The radome surface is PTFE (Teflon) giving excellent de-icing performance. ENVIRONMENTAL Temperature Operational -55°C +100°C Humidity MIL-STD-810D, Method 507.2, Procedure III (modified), for sealed equipment. Vibration Sine: In accordance with MIL-E-5400T, Figure 2 (Sheet 3), Curve Ill-b Method 514.3, Procedure I Random: MIL-STD-810D, Method 514.3, Procedure I, Category 5 Gunfire: MIL-STD-810D, Method 519.3 Salt Atmosphere Immersion Acoustic Noise MIL-STD-810D, Method 515.3, Procedure II, Category C MIL-STD-810B, Method 510, Procedure 1. DEF STAN 07-55, Section 4/1, Test D1. Fungus Rain Explosive Atmosphere Lightning RTCA/DO-160E, Section 23, Paragraph 23.6.2.1, Waveform Figure 23-1 +270 kV and -250 kV MECHANICAL Height Width Length Max Weight Connectors Mounting 14.4 mm (0.56") 88.9 mm (3.5") 88.9 mm (3.5") 0.25 kg (0.55 lbs) TNC Female 4 holes fixed location Chelton Limited has a policy of continuous development and stress that the information provided is a guide only and does not constitute an offer or contract or part thereof. Whilst every effort is made to ensure the accuracy of the information contained in this Data Sheet, no responsibility can be accepted for any errors or omissions. The copyright of antenna designs and images is copyright protected and owned by Chelton Limited. ©Chelton Limited. The Chelton Centre, Fourth Avenue, Marlo' Buckinghamshire, SL7 1TF, UK /