The Yagi directional antenna is one of the most widely used antenna in many families of urban and rural areas. It has the features of high gain, lightweight structure, erection and cheap. Therefore, it is particularly applicable to point-to-point communication. For example, it is the preferred antenna type for outdoor receiving antenna and the indoor distribution system. The more the Yagi antenna unit number, the higher the gain is. Generally, the typically used Yagi antenna is 6 - 12 units, the gain is up to 10-15dBi.
High-gain Palisade Parabolic Antenna
Choose from the cost, people often use the grid parabolic antenna as a repeater donor antenna. Since parabola has a good focusing effect, so the parabolic antenna has strong set of radio capacity, in a diameter of 1.5 m gate-like parabolic antenna, the gain can be reached G = 20dBi at 900 trillion frequency band. It is particularly suitable for point-to-point communication, for example, it is often chosen for repeater donor antenna. The parabolic uses grid-like structure, the purpose is to reduce the weight of the antenna and reduce wind resistance. Parabolic antenna can usually give the front to back ratio not less than 30 dB, which are the technical indicators that the repeater system anti-self-excitation of the receiving antenna must meet.
Indoor Ceiling Antenna
Indoor ceiling antenna must have the features of compact structure, beautiful appearance and easy installation. The indoor coverage ceiling antenna on the market today is of a lot of shapes, but the structure of the inner core is almost the same. The internal structure of the ceiling antenna, although the size is small, but in antenna broadband theory based on the means of computer-aided design, and use a network analyzer to debug, so it is good to meet a very wide band VSWR requirements in accordance with the national standards, the antenna works in a wide band its indicators is the VSWR is less than 2. Of course, if it is possible to achieve that the VSWR is less than 1.5, and that will be better.
Indoor Wall Mount Antenna
Indoor wall-mounted antenna is a kind of the widely used wireless antenna. It must also have the same advantages of a compact structure, beautiful appearance and easy installation. Indoor wall-mounted antenna, on the market today we can see a lot of shapes, but its share of the inner core is almost the same. This wall antenna internal structure belongs to the air dielectric type microstrip antenna. Due to use the broadening antenna bandwidth auxiliary structure, with the help of computer-aided design, as well as using a network analyzer for debugging, so it is better to meet the requirements of the work wideband. Incidentally, the indoor wall-mounted antenna has a certain gain of about G = 7 dBi.
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