Recently, many users have been inquiring about suction cup antennas. Today, we will talk about the technical performance, usage methods, and precautions of suction cup antennas, so that everyone can better use them and maximize their performance.
Definition of suction cup antenna
Let's first talk about the composition of suction cup antennas. The conventional suction cup antennas on the market are mainly composed of four parts: antenna radiators, strong magnetic suction cups, feed lines, and antenna interfaces (as shown in the figure below).
1. The materials of antenna radiators include stainless steel, pure copper, memory alloy, etc., and their shapes are usually whip shaped or rod shaped. In practice, a suction cup antenna radiator is a monopole (whip shaped) antenna, where one arm of a symmetrical oscillator is perpendicular to an ideal conductor plane (in the air). According to the antenna principle, the resonant frequency of a wire antenna is an integer multiple of 1/2 wavelength. According to the mirror principle, on an ideal infinite plane, the ideal small electrical size of a suction cup antenna is 1/4 wavelength. If you want to increase the gain, you can use a central inductance to increase the length of the antenna radiator (an integer multiple of 1/4 wavelength).
2. The function of a strong magnetic suction cup is to fix the entire antenna and ensure that the suction cup antenna is in conductive contact with the metal being sucked.
3. The common feeder lines include RG series (RG58, RG174), 3D wire, etc.
4. The common types of antenna interfaces include N-head, SMA, BNC, TNC, I-PEX, etc. Among them, the commonly used connectors for suction cup antennas include N-head, SMA, BNC, TNC, etc., which are male and female. When selecting an antenna, it is necessary to purchase a connector that matches the equipment.
