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One of the most important areas of RF and EMI (electromagnetic interference) protection and control is the use of contacts, gaskets and fingerstock. This article will discuss the various applications of these components in RF/EMI protection, as well as the principles and techniques for their use.

Contacts are components that conduct electricity from one point to another. Depending on their purpose, contacts can be used to conduct electric currents, attenuate or block RF or EMI signals, de-couple or completely block low-frequency signals, or shunt high-frequency noise around a circuit to keep it from impinging on sensitive devices. Some typical applications for contacts include for RF signal switching, circuit protection, and antenna switching.

Fingerstock is essentially a metal plate that can be bent to fit snugly into male and female connectors. It is used to provide a static conductor between two mating parts and can be used to reduce EMI levels from RF radiation. Fingerstock is commonly used in RF filter systems, shielding enclosures and grounding straps. The properties of fingerstock also make it ideal for protecting components such as relays and coils from damage due to RF interference.

Gaskets are slightly more complex components than contacts and fingerstock, and they are used to provide an electrical path between two mating surfaces. They are commonly used to provide a seal between metal components, and to prevent RF/EMI leakage between different sections of an electronic device. Gaskets are generally made of materials such as metals, plastics, rubber or foam. They are also used to improve the electrical performance of devices, as they can help reduce RF/EMI interference and attenuate high-frequency noise. Examples of gaskets and their applications include RF shielding around circuit boards, RF isolation between circuit boards and heat sinks, EMI/RFI shielding, grounding and EMI/RFI immunity.

Contacts, gaskets and fingerstock are essential components when it comes to RF/EMI protection and control. they can provide a static electrical connection between components, reduce EMI levels from RF radiation, or provide electrical paths between two mating surfaces. In addition, they can also improve the electrical performance of electronic devices. All these components have different properties, and must be chosen carefully in order to provide the right RF/EMI performance.

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