Antennas - a conductive element used to convert the energy supplied by the transmitter into the energy of electromagnetic waves radiated into space. Your entire antenna system must be adapted to emit as much energy as possible in the most efficient way.
The antenna is reciprocal. It is therefore capable of both emitting and receiving energy. Whether the antenna will be used as a receiver or transmitter, is determined by its properties. A suitable antenna is chosen according to the parameters with regard to the area of use.
In terms of placement, we divide the antennas into indoor, outdoor or antennas that can with stand extreme conditions. Our portfolio includes, for example, WiFi antennas that can be connected to routers, cellular antennas for cellular network reception, GPS antennas for your car or amplifiers for Tracing applications, and even antennas for your DVB-T2 television. In addition to the choice of technology, we also offer a wide range of mounting options, various connectors and any length of antenna power supply. You can find screw, mounting, adhesive, solder and magnetic antennas in our portfolio.
Antenna key parameters, that we deal with are:
The antenna gain mainly shows its efficiency. The gain is always relatedto the reference emitter. If the emitter is isotropic, we are talking about theabsolute gain in dBi. Furthermore, we can talk about the relative gain (givenin dBd), which is measured against a reference antenna (e.g. a half-wavedipole). The purpose of the measurement is to determine how many times morevoltage is measured at the terminals of the directional antenna than at theterminals of the reference antenna.
The directionality of the antenna is presented by aradiation pattern. The radiation pattern is actually three-dimensional, but inpractice, in most cases, it is represented by a 2D spatial section in avertical or horizontal plane. A very important parameter from this antenna iscalled emission angle of the antenna. It is the angle of the emission maximumwhich is defined by two values which correspond to a decrease in the maximumfield strength by 3 dB.
Directional antennas (e.g. Yagi) achieve higher gain values of 10-14 dBibut are more structurally demanding. Omnidirectional antennas (e.g. rodantennas) are less profitable most often around 3 dBi. The resulting gain canalso reach negative values especially in miniature versions of antennas such asmicrostrip etc. These values are sufficient for many technologies.
The impedance of antennas is most often 50/75 Ω and is related toanother very important parameter, SWR (standing wave ratio). The aim is toachieve equality between the antenna input impedance and the impedance of thewire. Under these ideal conditions SWR will be 1:1. Only then does the maximumenergy transfer between the line and the load occur.
The working width of the frequency band limits the antenna in terms oftechnology in which the antenna will work. The WiFi, GSM, UMTS, LTE, RFID, NBIoT, DVB-T / T2, GPS, Glonass, etc. technologies work in certain frequency bandsof on which your antenna should be designed.