Commonly used PCB boards in antenna design

In antenna design, the commonly used PCB boards are as follows:

FR-4: low cost, good mechanical strength and insulation performance, relative dielectric constant is generally between 4.0 - 4.5. Suitable for general wireless communication equipment antennas, such as Bluetooth, Wi-Fi and other short-distance communication antennas. It is more suitable for cost-sensitive applications with not particularly high performance requirements.

Rogers: has a low dielectric constant and loss tangent, which can effectively reduce signal transmission loss. Different models of Rogers board dielectric constants can be selected between 2.2 - 10 to meet different design requirements. Commonly used in high-frequency antenna design, such as millimeter wave antennas, satellite communication antennas and other wireless communication systems with high signal quality requirements. Common ones include Rogers 5880, Rogers 3003, Rogers 4350B, etc., and there is also Rogers 5880LZ low dielectric constant series.

Taconic: Taconic sheets have a lower dielectric constant, which can reduce the delay and distortion of signal propagation and facilitate the transmission of high-frequency signals. The dielectric constants of different models vary. Some common models have a dielectric constant between 2 and 5, which are suitable for applications in high-frequency bands such as millimeter waves. Among them, TLY-5 is made of very light cloth-textured glass fiber, which has the advantages of dimensional stability, low dissipation factor, low moisture absorption rate, high copper peel strength, and uniform dielectric constant. It can be used in automotive radar, satellite/cellular communications, power amplifiers, LNB, LNA, LNC, and Ka, E and W bands. RF-35™ is also a common model on the market and is suitable for various high-frequency applications.

Polytetrafluoroethylene (PTFE) sheet: The dielectric constant is stable, usually between 2.0 and 3.0. The loss is very low, suitable for high-frequency signal transmission. It is often used in high-precision, high-performance antenna design, such as radar antennas, antennas in the aerospace field, and high-frequency RF circuits.

Ceramic-filled sheet: The dielectric constant can be adjusted according to different ceramic filling ratios. It has high mechanical strength and heat resistance. It can reduce costs to a certain extent while maintaining good performance. It is suitable for medium and high frequency antenna design, such as 5G communication antennas, and miniaturized antennas with specific requirements for size and performance.

Wangling sheet: Domestic sheet, commonly used types such as polytetrafluoroethylene glass fiber cloth copper clad laminate series F4BM, F4BME, polytetrafluoroethylene glass fiber cloth ceramic filled copper clad laminate series F4BTM, F4BTME. In addition, the dielectric constant of the composite dielectric substrate series TP and TF can be controlled at 3.0~25, and has the characteristics of low tangent loss and low temperature drift. It should be noted that when PCB board factories use Wangling boards for processing, certain process problems may occur because they have never processed similar boards before.

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