Originally Posted by mrigank
One doubt if electronic antenna's are better why nano twist have manual antenna on roof?
In absolute terms there is no such thing as one antenna that is more powerful than another because antennas are passive devices. It is important to understand that an antenna's gain and type of antenna is less significant than how it is connected and where it is placed. The electronic antenna
are usually placed inside the vehicle. An amplifier is used to boost the signal level to compensate as it is placed inside. Advantages:
*No aerodynamic drag and no wind noise
*Non-destructive: no holes to be created in the vehicle body. Mounted inside
*Signal amplification Disadvantages:
*Need external power for the signal amplifier.
*Directional behavior, which can lead to nulls in the reception on certain angles around the vehicle.
*Poor radiation performance without signal booster.
*This type of antenna mounting configuration is considered least efficient. It does not have the benefit of groundplane and transfers the signal by an electrical phenomenon that is called capacitive coupling. The regular mast type "Manual" antenna
are fixed on top of the car. Advantages:
*Locating such an antenna on the roof gives the best radiation performance, with the antenna elevated above obstructions.
*Unidirectional, receive signals equally well from all directions.
*Less sensitive to the movement and rotation of the vehicle with respect to the transmitting source. Disadvantages:
*Need to drill and fix.
*Wind noise, and poor aesthetics in some cases
Many modern HU units have signal amplifier circuit built-in that reduces the need for an electronic antenna. So in your case as you already have the electronic antenna, get it connected to the power supply and make full use of it. I think this clears many doubts (As it helped me).