Multi-Harmonic Tuners

Focus created, in 2000, the Programmable Harmonic Tuner (PHT) using Harmonic Rejection Resonators and in 2004 the wideband multi-carriage harmonic tuner concept (MPT), for which it holds several patents.

The PHT tuners are now discontinued but always supported.

Harmonic Tuners - MPT

See a rare proof of how the harmonic tuner idea was born...

MPT use:

  • Two, three (or four) wideband probes, cascaded and independently movable inside the same slabline and
  • Appropriate calibration and tuning routines

These tuners allow, among other, generating independent impedances at two, three (or four) harmonic frequencies, simultaneously and accurately. Impedances at other than harmonic frequencies F1, F2, can also be tuned, as long as they satisfy the relation F2 > 1.2*F1.

The most popular tuner types are

  • the MPT (or MPT-Classic) with three probes (up to 3 frequencies) and
  • the MPT-Lite with two probes (up to 2 frequencies).

 

Tuning speed is around 2 seconds [1] and tuning accuracy 40 to over 50dB. The patented de-embedding calibration algorithm allows 3-probe MPT’s to be calibrated in less than 20 minutes per set of frequencies (Fo, 2Fo, 3Fo). The critical characteristic of “harmonic tuning isolation” is controlled by the MPT software and is, typically, better than 45dB. This restricts possible PAE measurement error, due to harmonic-to-fundamental tuning leakage, to less than ±1%.

MPT's are available from 400MHz to 67GHz in various multi-octave bandwidths :

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

Model: MPT-xxyy-zz

« xx » = Maximum frequency [GHz]

« yy » = Minimum frequency [0.1GHz]

« zz » = Number of probes, connector type, maximum power or other

MPT-xxyy  (example: MPT 1808)

Fundamental (Fo) frequency coverage:

Fo .....   yy to xx [GHz]  (example: 0.8GHz < Fo < 18 GHz)

Fo & 2Fo .... yy < Fo [GHz] < xx/2   (example: 0.8GHz < Fo < 9GHz; 1.6GHz < 2Fo <  18GHz)

Fo & 2Fo & 3Fo .... yy < Fo [GHz] < xx/3   (example: 0.8GHz < Fo < 6GHz; 1.6GHz <2Fo < 12GHz; 2.4GHz < 3Fo < 18GHz)

FREQUENCY

TUNER MODEL

TUNED FREQUENCIES

CONNECTOR TYPE

DATASHEET

 0.4 - 7 GHz

MPT - 704

Fo, 2Fo, 3Fo

7/16

0.4 - 8 GHz

MPT- 804

Fo, 2Fo, 3Fo

7/16

0.4 - 18 GHz

MPT - Lite - 1804

Fo, 2Fo or 3Fo

APC - 7

0.5 - 15 GHz

MPT - Lite - 1505

Fo, 2Fo or 3Fo

APC - 7

0.6 - 18 GHz

MPT - Lite - 1806

Fo, 2Fo or 3Fo

APC - 7

0.8 - 8 GHz

MPT - 807

Fo, 2Fo, 3Fo

APC - 7

0.7 - 10 GHz

MPT - 1007

Fo, 2Fo, 3Fo

APC - 7, N - Type

0.8 - 6 GHz

MPT - Lite - 608

Fo, 2Fo or 3Fo

7/16

0.8 - 8 GHz

MPT - 808

Fo, 2Fo, 3Fo

APC - 7

0.8 - 8 GHz

MPT - Lite - 808

Fo, 2Fo or 3Fo

APC - 7

0.8 - 12 GHz

MPT - 1208

Fo, 2Fo, 3Fo

APC - 7

0.8 - 12 GHz

MPT - Lite - 1208

Fo, 2Fo or 3Fo

APC - 7

0.8 - 18 GHz

MPT - 1808

Fo, 2Fo, 3Fo

APC - 7

0.8 - 18 GHz

MPT - Lite - 1808

Fo, 2Fo or 3Fo

APC - 7

1 - 21 GHz

MPT - 2110

Fo, 2Fo, 3Fo

3.5 mm

1.8 - 6 GHz

MPT - 618

Fo, 2Fo, 3Fo

APC - 7

1.8 - 12 GHz

MPT - Lite - 1218

Fo, 2Fo or 3Fo

APC - 7

1.8 - 18 GHz

MPT - 1818

Fo, 2Fo, 3Fo

APC - 7

1.8 - 18 GHz

MPT - Lite - 1818

Fo, 2Fo or 3Fo

APC - 7

2 - 10 GHz

MPT - 1020

Fo, 2Fo, 3Fo

APC - 7

2 - 12 GHz

MPT - 1220

Fo, 2Fo, 3Fo

APC - 7

2 - 30 GHz

MPT - 3020

Fo, 2Fo, 3Fo

3.5 mm

2 - 36 GHz

MPT - 3620

Fo, 2Fo, 3Fo

2.9 mm

2.4  - 9 GHz

MPT - 924

Fo, 2Fo, 3Fo

APC - 7

2.4 - 12 GHz

MPT - 1224

Fo, 2Fo, 3Fo

APC - 7

2.6 - 18 GHz

MPT - 1826

Fo, 2Fo, 3Fo

APC - 7

4 - 18 GHz

MPT - 1840

Fo, 2Fo, 3Fo

APC - 7

4 - 26 GHz

MPT - 2640

Fo, 2Fo, 3Fo

3.5 mm

4 - 36 GHz

MPT - Lite - 3640

Fo, 2Fo or 3Fo

2.9 mm

5 - 18 GHz

MPT - 1850

Fo, 2Fo, 3Fo

APC - 7

8 - 40 GHz

MPT - 4080

Fo, 2Fo, 3Fo

2.9 mm

8 - 50 GHz

MPT - 5080

Fo, 2Fo, 3Fo

2.4 mm

14 - 50 GHz

MPT - 50140

Fo, 2Fo, 3Fo

2.4 mm

8 - 60 GHz

MPT - 6080

Fo, 2Fo, 3Fo

1.85 mm (V)

1.8 - 10 GHz

MPT - 1018 (QUATTRO)

Fo, 2Fo, 3F,4Fo

APC - 7

 


  [1] MPT's require external computing power with >4GB RAM and 2GHz >dual-core processor.