19-430-10 UHF SatCOM Antenna The 19-430-10 UHF SatCOM Antenna is a combined low-high angle, low weight, high efficiency airborne UHF satellite communications antenna operating in the 225 MHz - 400 MHz frequency band. The antenna provides essentially hemispherical pattern coverage by means of two independent collocated elements built into a single, aerodynamic shell. A variant of the 19-430-10, the 19-430-10N, offers alternative types of connector. Low angle coverage is provided by the vertical element and high angle coverage is provided by the circularly polarised element. In this way, essentially full hemispherical coverage is achieved over the specified operating band. The 19-430-10 utilises a one-piece, vertical, shell moulded under heat and pressure for A vertically polarised, reactively matched, broadband sleeved monopole. A circularly polarised turnstile antenna comprising a pair of quadrature connected broadband horizontal crossed dipoles, fed via a pair of broadband baluns. The antenna is polarised Right Hand Circular (RHCP) according to IEEE definition. RHCP is interpreted as clockwise circular polarisation approaching an observer. The 19-430-10 comprises two independent elements: 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. 61.47 MM MAX 38.86 MM REF The Chelton Centre, Fourth Avenue, Marlow, Buckinghamshire, SL7 1TF, UK T: +44 (0)1628 472072 E: [email protected] W: chelton.c

high strength and resistance to moisture ingress. The horizontal element is contained within a circular, fibreglass, moulding which is securely and permanently fitted to the vertical shell. An aluminium alloy base plate provides for fixing the antenna to the airframe. Careful design of internal ribs and base-to-shell load transfer ensures very high side loading acceptance. ELECTRICAL Frequency 225 MHz - 400 MHz Gain Low Angle: Average within 2 dB of a quarter- wave monopole (+4 dBi typical) High Angle: +4.5 dBiC minimum (average full band)at zenith (+6 dBiC typical at zenith) Polarisation Low...