Low-Frequency Tuners (10MHz to 170MHz)

The patented Low Frequency Tuners (LFT) are a fraction of the size large of equivalent CCMT slide screw tuners that would use transmission lines and capacitive probes (slugs).

LFT use three or more tuning sections connected in cascade. Each section includes a transmission line (cable) and a parallel plate (rotary) air capacitor connected to ground. Proprietary software allows optimizing the size of the capacitors, the length of the cables and the number of tuning sections in order to best cover the Smith chart over a given bandwidth.

The capacitors are controlled by the same precise stepping motors and electronics, as used in all FOCUS tuners and impedance synthesis employs the same concepts used in the calibration techniques, impedance and tuning interpolation and tuning algorithms of the multi-harmonic tuners, MPT. Whereas therefore, the idea itself is simple, the technology which allows instantaneous tuning to any impedance, with an accuracy of 40dB or better, is the result of long development on other tuner types.

Work is ongoing to launch tuners down to 1MHz.

 

FREQUENCY

TUNER MODEL

 

CONNECTOR TYPE

DATASHEET

10 - 20 MHz 

LFT - 0002001

 

N-Type

20 - 40 MHz

LFT - 004002

 

N-Type

30 - 60 MHz

LFT - 006003

 

N-Type

40 - 80 MHz

LFT - 008004

 

N-Type

50 - 100 MHz

LFT - 01005

 

N-Type

60 - 130 MHz

LFT - 013006

 

N-Type

130 - 170 MHz

LFT - 0170130

 

N-Type

 


*The model number of each tuner is based on the frequency range and optional on the internal structure:

LFT-xxyy-zz where

« xx » = Maximum frequency [GHz]

« yy » = Minimum frequency [0.1GHz]

« zz » = Number of probes or other