Low capacitance diodes are a must for UHF crystal radios.
It follows that they are to be so wired that the capacitance between their leads is kept to a minimum.
This does not imply that the leads are to be cut to minimum length. In fact longer leads facilitate antenna-diode impedance matching.
Antenna-diode impedance matching
Stub matching is a must for maximizing the signal strength.
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| Dipole with a single diode |
Long diode leads may be used to form the stub.
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| Dipole with coil and diode |
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| Folded dipole |
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| Dipole with single-diode circular stub |
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