Microwave Tuning Elements

Metallic Tuning Elements

Metallic tuning elements have a metal tuning rotor inside a threaded mounting bushing. A thread on the rotor engages an internal thread in the bushing. The rotor threads are slotted across their axis with 2 slots 180¡ apart. By compressing the probe along its axis, the slots function as a spring. The probe threads are pressed firmly into flank-to-flank engagement with the internal threads of the bushing, eliminating backlash, while providing a uniform adjustment torque that is self locking. Standard models are useful from 2 to 33 GHz. Metallic tuning elements can be used to change the capacitive loading within a waveguide, or any place a metallic tuning probe is required.

All dimensions are in/mm.

Notes:

1. Gold plated brass bushings and chromated brass rotors in the sizes shown above are standard. Other sizes and/or materials are available, contact factory.
2. Hardware modifications:
   1. For slotted bushing, replace "S" in model number by "L".
   2. For ring nut (instead of hex nut), replace "N" in model number by "R".
   3. For no nut, replace "N" by "F".
3. Rotor adjusting slot is 0.060/1.5 x 0.016/0.41 for bushings where "H" is 0.120-80, 0.13/3.3 x 0.020/0.51 for bushings where "H" is 0.190-64, and 0.16/4.0 x 0.020/0.51 where "H" is 0.234-64.

Engineering Bulletin SG-670 Contents

• Metallic Tuning Elements
• Dielectric Tuning Elements
• Tuning Rotors
• Dielectric Resonator Tuners
• LC Tuning Elements
• Resistive Tuning Elements