High gamma compact harmonic tuner
OwnerChristos Tsironisinventor
Life of this patent
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Abstract
Compact, high Gamma, wideband, multi-carriage-multi-harmonic tuners use a meandering slabline structure and multiple probes and carriages. The meandering structure reduces the overall tuner length by more than half at 0.4 GHz. The required slabline bends are made using a vertical-to-horizontal slabline transition. Multiple probes are employed within the slabline segment closest to the test port, in order to minimize the insertion loss at higher frequencies, caused by the slabline bends. This tuner structure is mostly effective starting at fundamental frequencies below 1 GHz and operating at fundamental or harmonic frequencies as high as 18 GHz.
Claims6
A multi-carriage slide screw impedance tuner comprising two ports, a test port and an idle port, and a slotted, meandering, low loss airline (slabline) between the ports,
- whereby the slabline comprises three parallel straight sections, SL1 to SL3 and two “U” bends, U1 and U2, the total forming an “S”;
- and whereby U1 connects SL1 with SL2 and U2 connects SL2 with SL3;
- and whereby SL1 is attached to the test port and SL3 to the idle port;
- and five mobile carriages C1 to C5, sliding independently along the axis of the straight slabline sections SL1 to SL3, said carriages having vertically movable axes, each axis holding one reflective tuning probe (slug) P1 to P6, said probes being vertically insertable into the slabline slot and capacitively coupled with the center conductor of the slabline,
- whereby carriages C1 to C3 are mount on section SL1, carriage C4 is mount on SL2 and carriage C5 on SL3;
- and whereby carriage C1 is a double carriage comprising two independent vertical axes and carriages C2 to C5 are single carriages comprising one vertical axis each;
- and whereby carriage C1 controls a low frequency probe P4 and a high frequency probe P1, carriages C4 and C5 control low frequency probes P5 and P6 and carriages C2 and C3 control high frequency probes P2 and P3 respectively.
Dependencies are inferred from the claim text.