Micro Lambda Support

...

What good is the most powerful RF/microwave technology in the world if you’re unsure how to use it, right? Recognizing YIG technology may be new to some or even old hat for others, Micro Lambda understands that the key to selling any technology is to assist the customer in getting started with it and then getting the most out of it. That’s why our customer support team and engineering team are one in the same. No one knows our products and the best way to use them better than our engineers. So we give you complete and total access to them to help you with your application engineering and integration challenges.

We’ve assembled many of your most frequently asked questions and requested downloads here. So take a look around and please feel free to get in touch if you’d like to set up a pre- or post-sale support call to resolve any YIG related questions you might have. 

 

Application Notes, Specification Definitions
& Product Reprints

Micro Lambda Wireless is pleased to provide the following YIG product/technology information. This information should be helpful to both the YIG novice and seasoned engineer. If you would like to add a paper, or would like a specific topic addressed, please contact us.

Drivers/Control

Application Note - YIG Driver
Determining Frequencies for 12 Bit DAC
Standard Oscillator, Filter and Multiplier Driver Adjustment Procedure
Driver Setup and Calibration Procedure for YIG Components with Remote Drivers
Installation Instructions for Oscillators, Filters and Multipliers with Drivers
Serial Driver Control Using a PC (zip)

Oscillators / Sources

Technology Description

Product Release Reprints:

Broadband YIGs Yield Fundamental Tones to 20 GHz
SiGe Silences YIG Oscillator Phase Noise
Doublers Drive YIG Sources to 44 GHz
PCB Mount YIG Oscillators
Permanent Magnet YIG Tuned Oscillators
YIG Sources & Filters Reduce Noise

Filters

Technology Description

Product Release Reprints:

Dual-Channel Band-Reject Filter
VXI / VME Bandpass Filters
YIG Filters Tune 3 to 40 GHz
YIG Sources & Filters Reduce Noise
YIG Filters Shrink Size to 1" Cube

Synthesizers

MLSP Quick Start Guide
MLSP Series User Manual - Rev B
MLSP Support Files and PC Control (zip)
MLSP USB HID PC Interface and PC Control (zip)
MLSL Synthesizer Control Using a PC (zip)
MLSN Synthesizer Control Using a PC (zip)
MLMS Series User Manual Rev A
 

Product Release Reprints:

1-22 GHz Low Noise Synthesizer - 10/04
Permanent Magnet YIG Based Synthesizers - 3/98
MLSL Series User Interface / Programming
MLSN/W Series User Interface / Programming - 01/09
MLSC RS232-422 Converter Operating Instructions / Wire Harness

Test Instruments

MLBF Series User Manual Rev 1
MLBF Quick Start Guide
MLBF Support Files and PC Control (zip)
MLBS Series User Manual
MLBS Quick Start Guide

Product Release Reprints:

MLBF Series Bench Test Filter - 10/10


Legal Documents

Warranty and Return Policy
General Terms & Conditions of Sale

Support Contact Information:

Tel: (510) 770-9221
Fax: (510) 770-9213
Contact Support

Frequently Asked Questions

YIG stands for Yttrium Iron Garnet, a man made crystal structure is the best known
members of a family of ferromagnetic materials that possess unique properties. This material first synthesized in the laboratory in 1958 at Bell labs and in France has been the subject of innumerable investigations over the years. 

A highly polished sphere of single crystal YIG resonates at a frequency directly proportional to the applied magnetic field. The YIG crystal or sphere (in the case of YIG devices) has a high Q factor and is perfect for use as a resonator. Over the years various types of YIG material has been grown to cover a vast range of frequencies, namely 500 MHz to 50 GHz. In these cases the material is doped much like the doping in transistor growth or is combined with other material to yield YIG material across the wide frequency spectrum. 

Currently YIG’s are used in sphere (ball) configuration as this lends itself to better coupling in a microwave circuit. However, other sizes and shapes have been used over the years such as cubes, slices and films, but to a minimum in a production environment.   
There are numerous factors that enter into the tuning speed of a YIG device. However, there are some rules of thumb that one can use to get an idea of the basic tuning speed based on the mechanical package size. The speeds below are based on standard driver voltages of +/- 15 Vdc and no driver “tweaks.”
  • Standard 1.75” and 2” cylinders: 1-2 mSec per GHz tuned
  • Standard 1.25” squares: 700-800 uSec per GHz tuned
  • Standard 1” cubes: 500-600 uSec per GHz
  • Mini’s ½ cubic inch: 300-500 uSec per GHz
  • Fast Tune Mini’s: 100 uSec per per GHz
  • TO-8’s: Full band 3 to 6 GHz in 400-500 usec
If one starts changing to lower inductance tuning coils and changes the driver parameters including the driver input voltages, faster tuning speeds can be obtained.

 
The heater in a YIG device is used to elevate the temperature of the YIG resonator to approximately +80-85 degrees C. The material at this elevated temperature is less susceptible to emit spurious tones. The heater has a secondary effect on the temperature compensation (temperature drift) of the device over extended temperature ranges.
The best frequency range for a YIG resonator is 3.0 to 6.0 GHz. This is where the YIG material has shown the best overall performance including phase noise spurious performance and loaded “Q” value. Other bands such as 2 to 8 GHz and 8 to 18 GHz have also shown premium performance.
First off, a YIG device is a tunable component that requires a change in magnetic field to change the frequency of the device. So, you cannot operate a YIG device directly from a power supply as you will only be changing voltage and not the necessary change in current. Due to the changing resistance and impedance of the highly-inductive tuning coils present, a constant current source in-between the power supply and YIG device is required.

Product Guides

Oscillators Product Guide

YIG Oscillators Product Guide

YIG oscillators product guide

Synthesizers Product Guide

YIG Synthesizers Product Guide

YIG synthesizers product guide

Filters Product Guide

YIG Filters Product Guide

YIG filters product guide

Support Contact Information:

Tel: (510) 770-9221
Fax: (510) 770-9213
support@microlambdawireless.com

Frequently Asked Questions

YIG stands for Yttrium Iron Garnet, a man made crystal structure is the best known
members of a family of ferromagnetic materials that possess unique properties. This material first synthesized in the laboratory in 1958 at Bell labs and in France has been the subject of innumerable investigations over the years. 

A highly polished sphere of single crystal YIG resonates at a frequency directly proportional to the applied magnetic field. The YIG crystal or sphere (in the case of YIG devices) has a high Q factor and is perfect for use as a resonator. Over the years various types of YIG material has been grown to cover a vast range of frequencies, namely 500 MHz to 50 GHz. In these cases the material is doped much like the doping in transistor growth or is combined with other material to yield YIG material across the wide frequency spectrum. 

Currently YIG’s are used in sphere (ball) configuration as this lends itself to better coupling in a microwave circuit. However, other sizes and shapes have been used over the years such as cubes, slices and films, but to a minimum in a production environment.   
There are numerous factors that enter into the tuning speed of a YIG device. However, there are some rules of thumb that one can use to get an idea of the basic tuning speed based on the mechanical package size. The speeds below are based on standard driver voltages of +/- 15 Vdc and no driver “tweaks.”
  • Standard 1.75” and 2” cylinders: 1-2 mSec per GHz tuned
  • Standard 1.25” squares: 700-800 uSec per GHz tuned
  • Standard 1” cubes: 500-600 uSec per GHz
  • Mini’s ½ cubic inch: 300-500 uSec per GHz
  • Fast Tune Mini’s: 100 uSec per per GHz
  • TO-8’s: Full band 3 to 6 GHz in 400-500 usec
If one starts changing to lower inductance tuning coils and changes the driver parameters including the driver input voltages, faster tuning speeds can be obtained.

 
The heater in a YIG device is used to elevate the temperature of the YIG resonator to approximately +80-85 degrees C. The material at this elevated temperature is less susceptible to emit spurious tones. The heater has a secondary effect on the temperature compensation (temperature drift) of the device over extended temperature ranges.
The best frequency range for a YIG resonator is 3.0 to 6.0 GHz. This is where the YIG material has shown the best overall performance including phase noise spurious performance and loaded “Q” value. Other bands such as 2 to 8 GHz and 8 to 18 GHz have also shown premium performance.
First off, a YIG device is a tunable component that requires a change in magnetic field to change the frequency of the device. So, you cannot operate a YIG device directly from a power supply as you will only be changing voltage and not the necessary change in current. Due to the changing resistance and impedance of the highly-inductive tuning coils present, a constant current source in-between the power supply and YIG device is required.