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PP/JAI Web>BeamPosition>ClicBpm>Ctf3Prototype1 (02 Apr 2013, StewartBoogert)

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Dipole mode measurement

Unloaded

Port4 - antenna
Port3 - coupler 2
All other ports covered with foil
= 310
= 14995
BW = 48 MHz

Loaded

Same but all other ports terminated
= 250
= 14990 MHz
BW = 61 MHz

Reflection coefficient for each port

Transmission coefficient

Cross-coupling

Monopole mode measurements

Port4 - antenna
Port2 - coupler 3
Port3 - coupler 1
Couplers 2 and 4 covered with foil
$Q_{24}$ = 260
$Q_{34}$ = 310
$f_{24}$ = 11157 MHz
$f_{34}$ = 11160 MHz

Same with couplers terminated

Port4 - antenna
Port2 - coupler 4
Port3 - coupler 2
Couplers 1 and 3 terminated
$Q_{24}$ = 310
$Q_{34}$ = 290
$f_{24}$ = 11158 MHz
$f_{34}$ = 11172 MHz

Same with couplers covered with foil

Reference Resonant Frequency

Photographs

Temperature Stability

The position cavity was left over the weekend along with a probe measuring the ambient temperature. The temperature was recorded every minute and the resonant frequencies, every ten minutes.

The average frequency shift was 250±6 kHz/C

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Topic revision: r6 - 02 Apr 2013 - StewartBoogert

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