Table of Contents
- 1 How should a loop antenna be aligned to best receive the signals?
- 2 Does an antenna need to be straight?
- 3 How does a radio antenna receive signal?
- 4 Should an FM antenna be vertical or horizontal?
- 5 Does the shape of an antenna matter?
- 6 How long should FM wire antenna be?
- 7 What type of antennas should I use for off grid radio?
- 8 How high can a wire antenna be mounted?
How should a loop antenna be aligned to best receive the signals?
The best reception occurs when the axis of the loop antenna (inside the radio) is aligned at 90° to the direction to the station and at 90° to the electric vector of the wave. Hence, you can find the polarization of the radio signal.
Does an antenna need to be straight?
Don’t do that. When it comes to antenna signals, we say they are polarized in a particular way. In other words the waves travel sideways or up and down. In the US, all TV signals are horizontally polarized, which is why you have an antenna that sits flat in order to receive them.
How can I improve my AM signal on radio with a single wire antenna?
How to Get Better Reception for My Single Wire FM Antenna
- Disconnect the antenna, if it’s already attached to the radio, by pulling oot the antenna plug from the jack usually found on the back of the tuner.
- Reconnect the antenna after untangling.
- Tape the end of the antenna in position temporarily.
How does a radio antenna receive signal?
1) Electricity flowing into the transmitter antenna makes electrons vibrate up and down it, producing radio waves. 2) The radio waves travel through the air at the speed of light. 3) When the waves arrive at the receiver antenna, they make electrons vibrate inside it.
Should an FM antenna be vertical or horizontal?
Few commercial FM stations use vertical polarization; many use horizontal, and some use a sort of “hybrid” in order to make things work better with antennas on vehicles (which tend to be vertical).
Why does the radio give better reception at certain position of the antenna?
An antenna is a “collector” of radio signals that improves your reception by providing more signal than would be otherwise supplied to the receiver. If you improve reception by standing near or touching the radio or antenna, your system is telling you it needs a better antenna.
Does the shape of an antenna matter?
Obviously, the waves arriving at an antenna from a transmitter are exactly the same, no matter what shape and size the antenna happens to be. A different pattern of dipoles will help to concentrate the signal so it’s easier to detect.
How long should FM wire antenna be?
about 150 cms
The overall length for the antenna should be about 150 cms, i.e. each leg should be 75 cms. This length should make the resonant frequency fall slightly in the lower half of the FM broadcast band, but often the more popular stations may be found in this region.
Should I choose a horizontal or vertical HF antenna?
If you can have only one antenna and can chose between a vertical HF antenna or a relatively high horizontal HF antenna, go for the horizontal antenna! Wide‑band active small magnetic receiving loops (not to be confused with tuned magnetic loops) offer, when mounted close to the ground, improved noise immunity at reception.
What type of antennas should I use for off grid radio?
There are two basic types of antennas for off grid radio: Vertical and wire. Yes, I am aware that there are many others: Beams, loops, etc. But remember we’re trying to keep it simple, practical, and relevant. A vast majority of hams end up using either a vertical or a wire antenna. The reasons why are clear.
How high can a wire antenna be mounted?
Horizontal wire antennas also have a low angle of radiation, but it is dependent on elevation from the ground. This is why amateurs interested primarily in NVIS communications should not mount their wire antennas more than 30-50 feet up. There is such a thing as “too high”.
Can wire antennas be bended?
Wire antennas can be bent and shaped to fit your space. If you have to bend or droop a wire, it’s generally not a problem. Horizontal wire antennas also have a low angle of radiation, but it is dependent on elevation from the ground.