Question: How Far Apart Should Antennas Be?

Is a longer CB antenna better?

Choosing the Optimal CB Antenna Length Yes, taller/longer is better for range of distance when it comes to an antenna and the optimal antenna length is 1/4 wavelength.

That translates to 102 inches (8.5 feet), too tall to be practical for most mobile applications..

How do you increase the efficiency of an antenna?

If concern is antenna efficiency then material losses (copper or dielectric losses) are an important factor. You can apply reflecting surfaces, active component, EBG structure or slot matching etc to improve radiation efficiency.

What are acceptable VSWR levels?

A VSWR of less than 1.5:1 is ideal, a VSWR of 2:1 is considered to be marginally acceptable in low power applications where power loss is more critical, although a VSWR as high as 6:1 may still be usable with the right equipment.

What is intermodulation interference?

Intermodulation interference is the undesired combining of several signals in a nonlinear device, producing new, unwanted frequencies, which can cause interference in adjacent receivers located at repeater sites. Not all interference is a result of intermodulation distortion.

What does a diversity antenna do?

Antenna diversity is a technique that can be used to improve radio communication and maximize the chance of a packet getting through at a given time and in a given position between a receiver and transmitter in a non-static environment.

Do GPS antennas interfere with each other?

GPS antennas are RX only… unless they’re poorly designed or the feeds are poorly terminated, there shouldn’t be any issue with proximity to one another.

Where do I run my CB antenna cable?

The best place for your standard antenna is the center of your roof, where you will have the greatest ground plane coverage. When you install a CB antenna on the fender, bumper, or anywhere else around the edge of your vehicle, you will have a weaker signal going away from the vehicle.

What is the best height for a CB antenna?

Generally, the higher the antenna is above ground, the better it will perform. Good practice is to install your vertical antenna about 5 to 10 feet above the roof line and away from power lines and obstructions. Remember that the FCC limits your antenna height to 60 feet.

Can I use a splitter as a combiner?

The truth is that unless you engineer it differently, every splitter can also be used as a combiner. In most RF distributions, signals are always passing back and forth in two directions. A splitter or combiner would have to be specially engineered not to be bidirectional. See, a combiner is like a funnel.

What happens when antennas are placed too close together?

If they are positioned significantly further than one wavelength apart, the two antennas will likely exist in different fields of RF reflections. In this case, the likelihood of a multipath drop out condition existing at both receive antennas at the same time is not necessarily increased; but rather, becomes random.

Will two TV antennas improve reception?

Two HD Antennas Pointing in The Same Direction By adding a second OTA antenna you can increase your signal strength. If you already have an amplifier to boost your signal a second antenna can help to increase the consistency of your coverage.

How far apart do CB antennas need to be?

5’When installing a dual CB setup, you need an absolute minimum of 5′ between the two antennas. Anything closer, and the antennas will be too close to perform properly. Ideally, you should be closer to 9′ as a minimum for peak performance.

Can you put 2 antennas together?

Combiners (which cost about $20) merge the two sets of signals into a single stream of TV. Using a combiner is as easy as plugging the coax cables from the two antennas into the combiner device and then using a third coax cable from the combiner to connect to the Tablo OTA DVR or TV.

How much loss is considered acceptable in the antenna system?

While different systems have different acceptable return loss limits, 15 dB or better is a common system limit for a cable and antenna system.

What is cable loss in antenna?

Cable Loss refers to the amount of Power Loss over a Cable’s Length. … The losses are given as dB/100 ft; so the actual length of the cable in the system needs to be used to convert the value from the graph into the loss introduced by the cable in the system.

How does an antenna ground plane work?

Radio antenna theory In telecommunication, a ground plane is a flat or nearly flat horizontal conducting surface that serves as part of an antenna, to reflect the radio waves from the other antenna elements. The plane does not necessarily have to be connected to ground.

How far apart should antennas be placed when using diversity?

¼ wavelength apartAntennas in a product that implements antenna diversity have their antennas mounted at a distance of at least ¼ wavelength apart. This amount of spatial separation improves the probability that at least one antenna is NOT in a deeply faded signal condition.