Thesis (PhD (Electric and Electronic Engineering))--University of Stellenbosch, 2005. / A tunable X-band PIN diode switch, implemented in evanescent mode waveguide, is
presented. To allow in-situ tuning of resonances after construction, a novel PIN diode
mounting structure is proposed and verified, offering substantial advantages in assembly
costs.
Accurate and time-effective modelling of filter and limiter states of the proposed switch is
possible, using an evanescent mode PIN diode and mount model. The model is developed
by optimizing an AWR Microwave Office model of a first order switch prototype with
embedded PIN diode, to simultaneously fit filter and limiter measurements of four first
order prototypes. The model is then used in the design of a third order switch prototype,
achieving isolation of 62 dB over a 8.5 to 10.5 GHz bandwidth in the limiting state, as
well as reflection of 15.73 dB and insertion loss of 1.23±0.155 dB in the filtering state
over the same bandwidth.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/1463 |
| Date | 12 1900 |
| Creators | Sickel, Thomas |
| Contributors | Meyer, P., Van der Walt, P. W., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Detected Language | English |
| Type | Thesis |
| Format | 4915274 bytes, application/pdf |
| Rights | University of Stellenbosch |
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