3 Wire Broadband Antenna Short Wave Full Band HF Single Sideband 3.5MHZ--30MHZ. This is a full-band shortwave antenna. 3.5MHZ -- 30MHZ, suitable for you to work in shortwave operating frequency band (different frequency and frequency hopping), reliable performance, the communication distance can reach more than 3000 kilometers, and it is a shortwave base station antenna commonly used by government, military, three defense, fishery and other units. HF320A three-wire shortwave broadband dipole antenna without blind area.Reliable HF full band antenna. The three-wire antenna is a base station antenna with no blind area in the range of short wave broadband (3.5-30MHZ), which can maintain good communication in short distance, middle distance and long distance, therefore, it is widely used in the commercial field, especially the base station antenna selected by maritime station, fishery, meteorology, exploration, government, military and other units, which has reliable performance, fixed base station antenna and outdoor temporary base station emergency antenna. HF320A three-wire broadband dual-pole blind-free antenna is completely different from common broadband bipolar antenna. It adopts a unique three-wire dipole structure, the oscillator structure is double loop type, the radiation is higher than that of a single loop dipole antenna (that is, ordinary broadband bipolar antenna), the actual use effect is better than cage antenna, broadband bipolar antenna, Wendon antenna, shortened inverted V antenna, CP-6, stair antenna, T-antenna, long-line plus Sky antenna, GP, small-loop antenna... And so on are strong. The HF320A antenna has a gain of 3dbi --- 5dbi through simulation analysis, with uniform performance in the working frequency band, small standing wave, no need of Sky adjustment, no need of laying ground network, simple and flexible erection, no blind area for short-distance communication, both 360-degree omnidirectional and directional communication, light weight (1.9kg), stable erection, good wind resistance and good tolerance, fully meeting the use requirements of professional customers. HF320A three-wire antenna can choose two erection modes (inverted V and horizontal transverse pull erection) to adapt to different uses respectively. When the radius is 0-1000km and the operating frequency is below 12MHz, there is no blind area in the communication area. Therefore, it is often used in communication networking as a central base station, and can also be used in local platforms to form a reliable communication emergency support network. The front of the antenna oscillator is its radiation direction. Erection method: it is suggested that the height should be 6-7.5 meters or more, the angle at the top of the antenna should be 10-120 degrees (the smaller the angle, the closer the communication range), and the height at the end should be 1.5-2 meters from the ground.
If communication within 1000 kilometers is required, the setting direction of the antenna is not limited. If longer distance communication is required, the front of the antenna should face the communication direction. When hoisting, first use insulation rope to fix the two terminals of Barron in the middle of the vibrator, then lift them at the top of the vertical pole, and tighten the two ends of the antenna according to a certain antenna included angle, so that the vibrator can be straightened obliquely, fixed to complete the installation. Attention should be paid when erecting: the stainless steel cable vibrator should not touch the metal pole, when lifting, Barron should not be subjected to tension, Barron can not bear gravity and tension, lifting insulation rope, the stainless steel cable vibrator at the end of Barron 2 should be pulled.
The stainless steel vibrator can withstand 300 kilograms of pulling force. The feeder should be fixed on the vertical pole, and the coaxial lightning protection device should be installed at a distance of 3 meters from the ground to ensure safe lightning protection. The screws at the two ends of the yellow aluminum shell part installed (matched) in the middle of the antenna should be well protected against rust (just apply thick butter). Inverted V erection is suitable for communication networking between Central Station and sub-stations in all directions to form a reliable communication network.It also takes both the horizontal polarization wave and the vertical polarization wave into consideration, and has good communication effect on the fixed table using the horizontal antenna, the vehicle-mounted table using the vertical whip antenna and the personal back table. It is widely adapted and applied. Levelerection in horizontal pull mode. Horizontal Horizontal pull mode is mainly used for long-distance directional communication, and the communication distance can reach more than 3000 kilometers. It is the main force of long-distance directional communication (taking into account close range omnidirectional 360-degree communication without blind area).
The positive radiation signal of the vibrator is strong, and there is certain radiation on the side (there is little radiation on the lateral side of ordinary broadband and -shaped bipolar antenna). At the same time, it has 0-300 kilometers omnidirectional no blind area communication below 10MHz. The higher the height of the vertical pole is, the farther the communication distance is. If the communication distance is less than 1000 kilometers, the height of 7.5 meters can be selected. If the communication distance is more than 3000 kilometers, the height is recommended to be about 15-20 meters.When the antenna is horizontally pulled and erected, the height will affect the direction of signal radiation. When the height of the antenna is 2 meters (lower frame), the transmitted signal will be strong along the direction of the vibrator, the direction map and the direction of the 7-meter-high (elevated) are just 90 degrees apart. This method is set up quickly and is mainly used for outdoor temporary fixed emergency communication.
When the elevated frame is 7 meters, the signal direction is strong in the vertical direction of the vibrator I. The front, which is more suitable for long-distance directional communication. There is no close blind area for both elevated and low frame modes. Both distance and distance communication are considered.
Horizontal Horizontal pull erection requires two vertical poles with a height of more than 7.5 meters. Pulleys are installed at the top of the vertical poles. After the steel cables at the two ends of the antenna pass through the pulleys at the top respectively, the antenna is pulled up, and tighten it to the horizontal state.
The feeder should be 3 meters away from the ground, and the coaxial lightning protection device should be installed to ensure safe lightning protection. Horizontal Horizontal pull erection mode radiates stronger in the wide side direction of the antenna than in the narrow side direction, which is suitable for point-to-point and point-to-face communication. The height of the brackets on both sides is preferably 1/4 wavelength.
(For example, F = 10MHz, bracket height is about 7.5 m). HF320ATechnical parameters of three-wire antenna. There may be some delays due to flight, holiday, weather, local post, local natural disaster impact. It must also be in the original packaging. This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas".
The seller is "sauliai" and is located in this country: CN. This item can be shipped worldwide.