# Tag Info

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### Why do microwave ovens use magnetrons?

Magnetrons are cheap, reliable, pretty efficient (65% or so- and they tolerate high temperatures so heat sinking is easy) and made with mature technology. They are also reasonably tolerant of VSWR ...
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### How do I calculate the cutoff frequency of a low pass rc circuit?

The specific formula applies only for a first order RC low pass filter. This is derived from its frequency response: $$H(j\omega)=\frac{1}{1+j\omega RC}$$ The cutoff frequency is defined as the ...

### How do I calculate the cutoff frequency of a low pass rc circuit?

For a simple RC low pass filter, cut-off (3dB point) is defined as when the resistance is the same magnitude as the capacitive reactance: - $R = \dfrac{1}{2\pi f C}$ It's a simple math trick to ...
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### 40 GHz spectrum analyzer with N-type coax input?

The R&S instruments are equipped with female test port adapters. Edit: archived pdf You can replace the N type with a more suitable type for higher frequencies.