Microphone Equipment: The Antenna
There are many different types of microphone equipment. One piece of microphone equipment is the antenna. You need a good antenna and there are also several other considerations when it comes to this type of microphone equipment.
One of the most important things to think about when dealing with this piece of microphone equipment is the placement. The transmitter antenna needs to have the best "line of sight" possible.
If you are using a body pack transmitter it will either use an antenna separate from the mic line or the antenna function will be integrated with the ground wire of the mic.
Do not put the antenna along the back of a person from their waist to shoulder if the talent will be sitting on a metal-backed chair. You would also want to avoid putting the antenna along the front of the talent if it is facing up against a metal filing cabinet.
You will have better control over the antenna path if you use separate antennas. You can rig the antennas just on the basis of the best "line of sight."
You will want to rig the antenna with a little slack while still keeping it rather taut. Try attaching a rubber band and safety pin to the end of the antenna and securing the safety pin to a piece of clothing. The rubber band functions as a relief against strain when the performer moves or bends.
Pay attention that the antenna does not loop over itself. When the antenna needs to be placed in a downward direction you should not bend the antenna but invert the transmitter instead.
Since the antenna is an important piece of microphone equipment you will want to make sure that moisture does not cause a problem. Moisture will absorb RF energy and this will weaken the transmission. You can use a rubber sheath of surgical tubing, fuel line or shrink tubing to keep the antenna away from rain, excess perspiration or other moisture.
You will not want the antenna to cross over the microphone line. The mic line can loop over itself but you will need to run the antenna and the mic line away from each other. You can always turn the transmitter if necessary so that the lines do not cross each other.
Try to keep the mic cable as straight as possible. Your transmission signal will be reduced when you bunch the mic/antenna line. Shoving the mic cable into a pocket or under a waistband is not a good idea if you want a clear transmission signal.
Antennas are a crucial part of microphone equipment so be sure to take these thoughts into consideration.