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Receiver for Jupiter


Antenna for Observing Jupiter

The Jovian decametric emission can be detected with simple antennas such as a half-wavelength dipole or other low gain antennas such as the long-wire and full wavelength loop antennas. NASA Radio Jove Program gives the design of the dual dipole array suitable for observing Jupiter emissions. This antenna has gain of 8dB and is relatively simple to build. The following sections discuss the antenna in detail in terms of it's radiation patterns, construction, etc.

Antenna Basics: -

This antenna is an array of two half-wave dipoles seperated by a distance of half wavelength. And are maintained at a height of quarter wavelength. The dipoles are North-South aligned. (They can be aligned to East-West also depending upon requirement.) Signals from each single dipole antenna are added with a power combiner via two pieces of coaxial cable which are half wavelength long. (I am using Coaxial cable of RG-58 type of 50 ohms impedance.) The output of the power combiner is delivered to the receiver by another section of coaxial transmission line full wavelength long. This antenna receives horizontal polarization only. The antenna operates in following two configurations

1. Broadside case

2. End fire case

Estimation of Antenna Temperature

Constructional details of antenna

Photos of antenna