Jun 22, 2016 · A double cross antenna is great for reception of satellites like NOAA and Meteor since it has a sky oriented radiation pattern with very few nulls. This means that it can receive satellite signals coming from the sky well.

The CROSS Antennas are hard-hitting ground wave antennas. With power handling capabilities of 5 KW*, these antennas have a separate horizontal and vertical polarization. The CROSS Antennas are also excellent for 10 meter use, and are available in the 10 Meter Series by request.

Double Cross — A NOAA Satellite Downlink Antenna An easy to build antenna for ground reception of NOAA weather or amateur satellite signals. Gerald Martes, KD6JDJ Figure 1 — Ideal radiation pattern for a ground-based antenna for reception of NOAA weather satellite images. Figure 2 — The four dipoles that make up

A turnstile antenna, or crossed-dipole antenna, [1] is a radio antenna consisting of a set of two identical dipole antennas mounted at right angles to each other and fed in phase quadrature; the two currents applied to the dipoles are 90° out of phase. [2][3] The name reflects the notion the antenna looks like a turnstile when mounted horizontally.

Jan 22, 2021 · Cross polarization is defined as the difference in decibels between the maximum radiation intensity of the required polarization (Co-Polarization) and cross polarizations. The cross polarization is specified for an antenna as a power level. The …

Nov 2, 2022 · Hello, I am attempting to construct a double-cross antenna as detailed in this document but Im a bit confused about the dipole lengths: https://www.qsl.net/py4zbz/DCA.pdf. I've previously built a 137mhz v-dipole using 3/8" copper tubing and had to trim the elements to 51cm for resonance at 137.5 mhz.

Antennas can be designed to transmit and receive radio waves in all horizontal directions equally (omnidirectional antennas), or preferentially in a particular direction (directional, or high-gain, or "beam" antennas).

Dec 10, 2018 · Double Cross Antenna for NOAA Satellites will help you clear the basics of satellite communication as well as RF communication.

Two “Cross” antennas can be nested together, and properly fed to produce a radiation pattern that is appropriate for reception of signals from Polar Orbiting Earth Satellites. When the two pairs of Crossed dipoles are mounted together as shown in figure 13, they will produce a free space radiation pattern as shown in figure 14

Shop Jo Gunn Antennas. We have a wide variety of antennas to select from. V Series, Super Audio Flat Series, Star Series, Cross Series and more!