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Ch 5 |
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6. Radio Frequency Bridges.
Contents:
6.1 Bridge basics. Part
1: Christie's Bridge. Generalising the bridge. Voltage-splitting
networks. Part
2: Generators and detectors. Part
3: Practical impedance bridges. Admittance bridge. The
universal bridge. Vector and scalar addition. Impedance
magnitude bridge. Monitoring Bridges. |
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6.2 Current transformers. Part
1: Intro. Equivalent circuit. Models. Transfer function.
Output impedance. Insertion
impedance. Part
2: LF response. Core selection. Propagation delay. Secondary
capacitance. |
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Part
3: Multiple secondaries. |
 A
6.1: Current transformer coupling factor. A
6.2: The maximally-flat current transformer. A
6.3: Amplitude response of conventional and maximally-flat
current transformers. |
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6.3 Transmission bridges. Part
1: Current transformer bridges: Low frequency compensation.
Douma-Buschbeck (capacitive voltage sampling) bridge. |
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6.4 Reflectometry. Part
1: <writing in progress>. |
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6.5 Magnitude-Difference
Bridges. Part
1: Intro. Prototype current-transformer magnitude-bridge.
Insertion defect. Load-side voltage sampling. Port balancing.
RVS. CVS. Detectors and summing networks. Absolute measurements.
Part 2: . < >. The
M50 Match Meter (Historical). |
 References
for chapter 6. |
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Appendices: A
6.4: Evaluation and optimisation of current-transformer bridges. Part
1: Circuit model. Test procedure optimisation. Data analysis
techniques. Faraday shield displacement current. Part
2: Factors affecting phase and amplitude performance.
Bridge performance evaluation. Inductance balance and phase compensation.
Part 3: Phase compensation
techniques cont'd. Bridges without Faraday shield. |
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A
6.5: A self-evaluating precision reference bridge. Using
the theory developed in A6.4 to produce a 50W
transmission bridge with phase accuracy better than ±0.1°
and magnitude accuracy better than ±0.2% over the 1.6
to 30MHz range. A
6.6: RVS and Maxflat transmission bridges < >. . |
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Hatfield
RF Bridge Type LE 300/A and LE 300/A1. Douma's
generator power-factor correction scheme. Herzog's
current-transformer LF-compensation method. |
 Reflectometry.
Unfinished 1:
Unfinished 2: |
© D W Knight 2007.
David Knight asserts the right to be recognised as the author of this work.
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Ch 5 |
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