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US 8,912,861 B1Granted
Mechanically controlled variable capacitors for impedance tuners
OwnerChristos Tsironisinventor
Life of this patent
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Abstract
An improved grounding technique for mechanically adjustable rotary capacitors uses a directly grounded bronze sliding contact to effectively and continuously ground the rotating comb-like blades of the capacitor. RF measurements of the continuity and repeatability of the capacitance settings prove the suitability of the modified capacitors for using in pre-calibrated multi-capacitor MHz range impedance tuners.
Claims8
A method for improving the RF behavior and tuning continuity of mechanically adjustable rotary capacitors,
- said capacitors comprising a static set of comb-like parallel metallic blades, and a mobile set of comb-like parallel metallic blades,
- said sets of blades being able to overlap each-other interdigitally, without making galvanic contact, by rotating said mobile set of blades to adjust the overlapping area,
- said mobile set of blades being grounded and said static set of blades being insulated from ground (floating),
- and a conductive sliding contact connected between the edges of the rotating mobile blades and ground.
1 more element
Dependencies are inferred from the claim text.