What is an RF resistor?
RF and Microwave Resistors are devices that introduce an opposition to the flow of RF signals. They can be mounted on heat sinks to improve heat dissipation. RF/Microwave resistors are made of substrate materials like alumina, ALN, BeO, tantalum nitrate and CVD. These resistors are usually manufactured in a thick/thin film process and are available in various package types like chip, surface mount, flanged, through-hole and others.
Key parameters for RF resistors include resistance, operating frequency, technology (type of process, typically thick or thin film, used in their construction), and power rating.
Vishay’s CH series thin film Microwave Resistors offer pure alumina substrate (99.5%). These miniaturised components are designed so that their internal reactance is very small. When correctly mounted and utilized, they function as almost pure resistors on a very large range of frequencies up to 50GHz.
The Vishay FC series chip resistors are designed with low internal reactance. They function as almost pure resistors on a very high range of frequencies. The specialized laser edge trimming allows for precision tolerances to 0.1 %.
They are of a small standard size (0402 case size) and are edge trimmed block resistors with high purity alumina substrate. They have an ohmic range of 10 Ω to 1000 Ω with small internal reactance (< 10 mΩ) and low TCR (down to ± 25 ppm/°C).
Kyocera AVX crossovers are miniature, low profile devices that allow designers to avoid the use of PCB vias or coaxial jumper cables when DC supply voltage lines must cross one another or cross over RF signal lines. They are manufactured using MLO technology which matches the CTE of PCB material and provides low loss across a wide RF spectrum.
