PCB Tech - The improvement of PCB design super long board

In the field of microwave high-frequency circuit boards (such as communication antennas, satellite antennas, microwave antennas, etc.), circuit boards over 800mm are usually called ultra-long circuit boards or ultra-long PCB antenna boards. This circuit board is used as a modern electronic information industry. Indispensable supporting products have been rapidly applied and widely developed in the fields of mobile phones, car phones, wireless communications, radio and television. However, most of the existing antenna board structures are designed for PCB board design specifications below 800mm. When applied to an ultra-long antenna board structure, serious problems will arise regardless of signal fidelity, service life, and manufacturing design costs.

In response to the defects of the existing technology, PCB newly discloses a new structure of an ultra-long PCB antenna board. Through structural improvements such as PCB aluminum substrate and antenna unit, it can effectively ensure the overall strength and signal transmission of the antenna board, and the structure is simple. low cost. In order to achieve the above purpose, the ultra-long PCB antenna board realized by the following technical solutions includes a metal substrate. The upper surface of the metal substrate is provided with an antenna circuit layer. The antenna circuit layer is composed of an antenna unit and a ground unit. The antenna unit passes through the feed unit Connected to the ground unit; the lower surface of the metal substrate is provided with a tin-plated layer, and the tin-plated layer is covered with a glass glue layer. Through the above structure, the addition of a tin layer and a glass glue layer under the traditional metal substrate not only ensures the good insulation performance of the product, but also enables the metal substrate to have good strength, thereby increasing the toughness of the entire antenna board and enabling it to 800_ above, such as 1200mm in length to maintain a good service life; by using the feed unit to combine the antenna unit with the ground unit can reduce the installation difficulty of the antenna unit, and make the antenna unit easy to disassemble and replace, and is used in longer antenna board applications At this time, more antenna units can be installed by increasing the number of feed units, thereby reducing production and use costs. The above-mentioned feeding unit can be any structure that can be partially combined with other units at both ends, such as a double-ended clip, a cassette with grooves at both ends, etc. This kind of product is common in the electronics industry and is also available in the market. Can be purchased. The aforementioned metal substrate may be a common metal substrate in the antenna field, such as an aluminum substrate, a copper foil substrate, etc., which are well known in the art. Among them, the grounding unit is L-shaped, which effectively controls the volume and maintains a certain bending strength. Among them, the antenna unit is in multiple groups, which can transmit signals of different specifications, such as mobile communication signals, satellites
Signal etc. Wherein, the metal base plate is provided with positioning holes to facilitate the fixed installation of the antenna board on other overall structures. Through the above structural improvement, the antenna board of the present invention can provide excellent signal transmission capability over a longer length, and has a good service life, low production and use cost, and high scalability.