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Simon wrote:
Hi, I'm playing around with some 433MHz transmitter and receiver pairs. Ideally I would like the transmitter to transmit in a narrow directional beam, but I'm new to the art of radio waves and antenna design, so I was wondering if you guys would be able to help me with my project. I've read about a Yagi design for the antenna, I know it receives from one direction only, but does it transmit in just one direction too? As a general rule, the recieve and transmit patters of an antenna will be the same. You may see some difference in propagation patterns due to frequency differences between TX and RX pairs, but those should be very minimal. The amount of difference will depend on the selectivity of the antenna. Simon. -- Donovan Hill VA7LNX |
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