Rhombic TV Antenna

Introduction

A rhombic tv antenna is a wideband antenna. It consists of a horizontal diamond suspended from four pillars, one of the diamond-shaped sharp angles connected to the feeder, and the other sharp angle connected to a terminal resistance equal to the characteristic impedance of the diamond antenna. Its maximum emission direction points into the vertical plane in the direction of the termination resistor and is unidirectional.

Performance

Power loss

The best performance is obtained when the elevation angle of the first maximum value in the height factor is equal to the elevation angle of the main lobe of the diamond antenna itself. The rhombic tv antenna has a large power loss in the absorption resistance, and the efficiency is generally only 50%~80%, but the directionality is strong, so the gain coefficient is still high, and the gain coefficient of the commonly used single diamond antenna can reach about 100 (20 decibels).

Increase efficiency

One of the ways to improve the efficiency of the diamond antenna is to use a feedback rhombic antenna, which has no absorption resistance, and uses a feedback line to return the remaining energy after radiation through the diamond wire to the input, so that the power loss can be reduced, but the length of the feedback line is related to the working frequency, the adjustment is difficult, and the working frequency band is narrow.

Structure

The diamond antenna is an equilateral parallelogram shaped antenna. In general, it has two opposite sharp angles. The tilt angle θ is approximately equal to 90° minus the angle of the main lobe. The diamond-shaped antenna is based on the principle of a traveling wave radiator. It is arranged in the form of a diamond or diamond, and hangs horizontally above the surface of the earth.

Advantage

The rhombic tv antenna has simple structure, economical erection and convenient maintenance; When the antenna is operating, the standing wave component is small, so there is no problem of excessive voltage or current, and it can be applied to high-power transmission. In addition, the load resistance of the traveling wave antenna terminal absorbs part of the power, so the efficiency is generally 50%~80%, but the directionality of the diamond antenna is strong, considering the load loss, the antenna gain can generally reach 7~8dB. Therefore, the diamond antenna array is a good choice for short-wave communication antennas.

Certificate

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Shipping

We will send the goods to you by DHL, FEDEX, UPS, EMS, AIR, etc. Usually 7-15 working days after receiving your 100% payment. For bulk orders: 15-35 working days after receiving the deposit.

Packaging

To better ensure the safety of your goods, professional, environmentally friendly, convenient, and efficient packaging services will be provided. After receiving the goods, if you have any dissatisfaction or other issues, please contact us ASAP, and we will give you a fast response and reasonable solution.

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