Focus Microwaves - Low Frequency Tuners
The low frequency tuners are a unique product technology using MPT algorithms for low frequency wideband tuning. Three or more cascaded tuning sections use series transmission cables and parallel rotary capacitors.
The length of the cables and number of tuning sections are optimized for maximum tuning range over a given bandwidth. HLFT tuners use 6 tuning sections allowing second harmonic frequency tuning.
A multi-band, electro-mechanical programmable impedance tuner for the frequency range between 10 and 200 MHz uses cascades of three or more continuously variable mechanical capacitors interconnected with sets of low loss flexible or semi-rigid cables; for each frequency band a different set of cables and capacitors are used. The cables and/or variable capacitors inside each tuning block are switchable manually or remotely. Multi-section variable capacitors are also used. Instantaneous impedance tuning is effectuated by changing the state of the capacitors using electrical stepper motors. The tuner is calibrated using a vector network analyzer and the data are saved in the memory of the control computer, which then allows tuning to any user defined impedance within the tuning range. Reflection factor values between O and higher than 0.9 can be obtained using this tuner at all frequency bands.
Model |
Min Frequency |
Max Frequency |
Type |
Datasheets |
| LFT000300015 | 1.5 MHz | 3.0 MHz | Fundamental Low Frequency | |
| LFT002001 | 10.0 MHz | 20.0 MHz | Fundamental Low Frequency | |
| LFT004002 | 20.0 MHz | 40.0 MHz | Fundamental Low Frequency | |
| LFT006003 | 30.0 MHz | 60.0 MHz | Fundamental Low Frequency | |
| LFT008004 | 40.0 MHz | 80.0 MHz | Fundamental Low Frequency | |
| LFT01005 | 50.0 MHz | 100.0 MHz | Fundamental Low Frequency | |
| LFT013006 | 60.0 MHz | 130.0 MHz | Fundamental Low Frequency | |
| LFT0170130 | 130.0 MHz | 170.0 MHz | Fundamental Low Frequency |
More Product Information
Focus recommends TRL Calibration Kits for applications such as load pull & noise parameters. Due to high reflection and low loss, tuner S-parameter measurements represent a challenge for VNA’s, because of error term determination and coupler directivity. Long experience has taught us not to rely on other calibration techniques than TRL (Thru-Reflect-Line). The popular SOLT technique is conditionally useable, but not guaranteed, up to 4GHz. The much convenient ECal method has provided questionable and inconsistent results. Our Customers are advised to be very careful with VNA calibrations, because the whole measured data depends on that.
Because of this, and to save our customers time and doubt, Focus has developed and offers a set of precise and reliable TRL calibration kits from 0.03 to 110 GHz with the following connector types: 7/16, N, APC-7, 3.5mm, 2.9mm, 2.4mm, 1.85mm, WR-15, WR-10. Our calibration kits are compatible with all commercial network analyzers.
For more information on TRL Calibration Kits, please read the following paper on TRL Versus SOLT
Our 2 Series cable assembly showcases excellent phase stability against bending, developed with microwave/mmWave measurement environments in mind.
Its flexibility means low repulsion, reducing the load on the measured object
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Coaxial and triaxial measurements up to 10,000 V
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High-quality construction with low-noise electrical performance
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Replaceable probe tips in a variety of tip sizes
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Temperature range of -60°C to 300°C
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Triaxial measurement ensures a much better understanding of device leakage in the off state
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Highly reliable, stable and repeatable measurements
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Integrally designed as part of a complete measurement solution
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Long holding time: 80 hours with 10 STP liter He-3 gas
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Stable He-3 pot temperature: Separate sippers for 1K pot and the charcoal sorb cooling line
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Sample can be loaded or removed when the cryostat is cold
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Low noise, low vibration
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Multiple operation modes: He-3 cryostat can be operated without pumping the 1K pot (referred to as 4K operation mode)
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Accurate & reliable time data from a trusted source. Precision hardware PTP timestamping to 8ns
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Remote configuration and status via web browser, remote monitoring with SNMP
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Synchronization between users – eradicates discrepancies System time stamping, such as e-commerce transactions, e-mail sent & received, is highly accurate
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Automatic systems procedures such as backups occur at the correct time and in the correct order
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Additional time signal outputs can feed to other systems
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Multiple time source fall back and priority configuration can ensure high synchronization availability
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Various oscillator choices allow for long holdover to maintain time accuracy when synchronization signals are absent
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Monochrome (G-503B) and color (G-503C) models
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GigE Vision interface with Power over Ethernet
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Screw mount RJ45 Ethernet connector for secure operation in industrial environments
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Supports cable lengths up to 100 meters (CAT-6 recommended)
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Comprehensive I/O functionality for simplified system integration
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Popular C-Mount lens mount
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Easy camera mounting via standard M3 threads on top and bottom of housing or optional tripod adapter
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Easy software integration with Allied Vision's Vimba Suite and compatibility to the most popular third party image-processing libraries.
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Defect pixel masking feature with the Defect Mask Loader tool that allows you to manage a user defined defective pixel list to match your application and optimize the life cycle of the camera.
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Select between B 270 ASG protection glass and filter types: Jenofilt 217 IR cut filter, Hoya C-5000 IR cut filter, RG715 IR pass filter, or RG830 IR pass filter
- Improves your QA through configurable logging
- Allows you to retain power of control on how boards are tested by third parties
- User-friendly environment reduces your training costs for production operatives
- Ability to test multiple boards, simultaneously, by using multiple XJLinks
- The LL137 Series provides a focused line of illumination in a passively cooled design.
- Provides a medium intensity level of 280kLux (working distance of 75mm)
- Pre-engineered for expandability in 6” (152mm) increments up to 96” (2.44m).
- Available intensity control provides illuminance adjustability for every 6″ increment via a 0 – 10v input
Note: If only looking for white illumination, our LL167 Series provides a 74% brighter beam in a similar package.
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High SNR mode (up to 24 dB better signal-to-noise ratio)
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Low-noise binning mode
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Shading correction
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Defect pixel correction
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Area of interest (AOI), separate AOI for auto features
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Binning
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Decimation
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Auto gain (manual gain control: 0 to 24.4 dB)
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Auto exposure (31 µs to 67 s)
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Auto white balance
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Look-up table (LUT)
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Hue, saturation
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Color correction
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Local color anti-aliasing
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Reverse X/Y
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Deferred image transport
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Trigger programmable, level, single, bulk, programmable delay
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Sequence mode (changes the camera settings on the fly)
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SIS (secure image signature, time stamp for trigger, frame count etc.)
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Storable user sets
Scope of delivery
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Camera and IEEE 1394b cable (other configurations on request)
Focus Microwaves
Focus Microwaves is a pioneering engineering company, built around the innovations of its founder Dr. Christos Tsironis who developed his first manual tuner in 1973 and is the inventor of most existing electro-mechanical tuner families. The success of Focus is based on the engineering and manufacturing skills of its highly motivated and experienced team of engineers and technicians, who have been trained and encouraged to develop new technologies. In addition, listening to our customers needs and insights helps us discover and develop new and measurement methods on an ongoing basis, relentlessly pushing the limits of what is possible.
From humble beginnings in 1988, Focus has become the main supplier of advanced Load Pull and Noise Tuner Systems. Our mission is to provide effective, reliable and innovative solutions for non-50 Ohm testing (Noise and Load Pull) of RF microwave transistors, thus enabling our customers to compete in the marketplace with better designs and to advance the understanding and knowledge of the field.
Contact Details
Focus Microwaves Inc. Main Head Office
4555 Chem. du Bois-Franc, Saint-Laurent, QC H4S 1A8, Canada
Phone: +1-514-684-4554
Test & Measurement
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