The story of how yig behaves is quite beyond the scope of this document, but it is highly interesting for. Minimum output power is dbm and have no spurious higher than 70dbc. The intensity of this field determines the frequency that the yig sphere resonates. Aug 03, 2014 wavetek 907 repair, yig oscillator teardown. Yig yttriumiron garnet tuned transistor oscillators generating fundamental power up to 8 ghz have been unexcelled for several years. The isolator ensures that any rejected signals are absorbed in the isolator and do not interfere with the front end detector circuitry. This high q characteristics provides very low phase noise and multioctave frequency tuning. It describes the oscillation produced by the bulk gaas device, the frequency tuning of the yig sphere. Wavetek 907 repair, yig oscillator teardown kerry d. Looking for yig oscillators and dielectric resonators. Oscillator design guide structure the oscillator designguide is integrated into agilent eesofs advanced design system environment, working as a smart library and interactive handbook for the creation of useful. Us20020005762a1 tuning circuit for a yig oscillator. Id guess this is pcb board off a yto yig tuned oscillator, unsure of the exact hp model number.
The oscillator is tuned by a current through a single turn loop through an octave or more in the ghz range. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Yigtuned oscillator exclusive authorized distributor more information in our webshop at. Noise measurements of yig tuned oscillator sources for the alma lo eric w. Bernd kaa, dg4rbf a simple approach to yig oscillators vhf communications 42004 217. Glenn research center, cleveland, ohio a differential sige oscillator circuit uses a resonant ringoscillator topology in order to electronically tune the oscillator over multioctave bandwidths. Solidstate oscillators whose tunable element is a sphere of yttriumirongarnet yig. Another yig application is yig oscillators, where the sphere acts as a tunable frequencydetermining element. Yig oscillator basics yig oscillator app note,vendors.
Yig tuned oscillator yto yig tuned filter ytf driver. Yig tuned filters use several spheres for a high order filter. If the impurity concentration of a normal pn junction is highly increased, this tunnel diode is formed. Yigtuned oscillator design on printed circuit board using. The cavity length is changed by a micrometer adjustment. Differential resonant ring yig tuned oscillator this oscillator can be used in cognitive radios and for satellite communications. One can easily achieve respectable phase noise performance with a fairly simple single or dualloop pll by tolerating the slow tuning speed, large size, high power consumption, and relatively high cost of a.
This additional material on yig technology just in from james, a semiconductor guy with some rf test experience. This high q provides very low phase noise in oscillators and multioctave frequency tuning for both oscillators and filters. Bradley nrao, charlottesville, va 22903 24 august 2000 in this memo, we present measurements of the noise of yigtuned oscillators ytos at their fundamental. A tuned oscillator is disclosed which comprises an active element 37, a resonator 35 electrically connected to the active element and made of a magnetic material using ferromagnetic resonance phenomenon, and a magnetic circuit for applying a magnetic field to the resonator. As i mentioned in my previous posting, there was an issue with my wavetek 907 microwave. The oscillator circuit that is built using a tunnel diode is called as a tunnel diode oscillator.
I ordered some samples from analog devices at the time, but only just got around to. Yig oscillator donald benson, ali tatari, amaaduddin, san jose state university fall 2009, ee 172 abstract a resonator based on yig yttrium iron garnet and a bipolar amplifier were implemented, targeting application as an oscillator in the pdf rf and microwave instruments, such as signal and network analyzers, require wideband, swept frequency signals to. This paper describes a revolutionary approach to yig tuned oscillator design which makes use of a unique combination of a miniaturized magnetic structure, and a gaas hbt ring oscillator circuit. Yig tuned oscillator yto for a very wide band that can reach decade tuning with high frequency stability and for frequency range of 1 ghz to 50 ghz. Applicable to test instrument and electronic counter measures ecm. In the case of a tuning circuit for a yig oscillator, wherein the output frequency of the yig oscillator which is reduced by a frequency divider or mixer is compared in a phase detector with a lower reference frequency and via a loop filter the output voltage of the phase detector feeds the aircored coil of the yig oscillator serving for fine tuning, the main coil of the yig oscillator is. Core element is a small yig sphere, placed in a magnetic field. Switched or tuned filters of some sort generally creep into the design. Microwave synthesizer modules yigtuned filters yigtuned. Yig oscillator donald benson, ali tatari, amaaduddin, san jose state university fall 2009, ee 172 abstract a resonator based on yig yttrium iron garnet and a bipolar amplifier were implemented, targeting application as an oscillator in the yig oscillator.
Yig is a very interesting microwave material with properties that can be substantially modified by the application of a strong magnetic field. Yigtuned oscillator lpo030753001 pdf catalogs catalogs. Yto yig tuned oscillator and yig yttriumirongarnet. Yig tuned oscillator, 18000mhz min, 30000mhz max private private private private. The yig sphere behaves like a resonator with to8000 unloaded q resulting in very good frequency stability. The adf4107 chip seemed like a good starting point, since its specified for coverage from 1 ghz 7 ghz. A simple approach to yig oscillators vhf communications magazine.
In the foreground are the three components whose develop ment made the broadband rf plugin possible. It is coupled to an amplifier which provides the required feedback for oscillation. It is also known as esaki diode, after its inventor. A yigtuned oscillator consists of a yig sphere mounted on a rod that is positioned inside of a magnetic field. The omniyig yom series provides fundamental yigtuned oscillator designs electronically tuned in octave and multi octave bands. Yig tuned oscillators exhibit a low level of phase jitter, and their broadband characteristics from, iron garnet yig tuned oscillators ytos neatly solve this problem with good, wideband phase noise, because each oscillator has fixed. The second convertor mixes 3900 mhz down to 300 mhz. Microwave synthesizer modules yigtuned filters yig.
Is it possible to use a yig tuned filter to make a yig tuned oscillator. Dragged it to the microwave lab at the university, and tested it on a spectrum analyzer. Teledyne microwave solutions yig products supplies both closedand open loop yig filters, yig oscillators, yigtuned harmonic generators, and yigbased. Micro lambda wireless offers the largest yig tuned oscillator product line in the market today including permanent magnet and electromagnetic designs covering frequency ranges from 500 mhz to 44 ghz in your choice of narrow or wideband configurations. It has interesting magnetic properties which allow it to perform as a tunable microwave filter for example. It mentions yig oscillator application note and vendorsmanufacturers of yig oscillator. Electronically tunable over the entire 2to18ghz frequency range, a family of yig tuned oscillators employs thinfilm technology coupled with galliumarsenide gaas fieldeffecttransistor fet active devices for low phase noise. Description 1 description 2 description 3 document. Yig filters tuned by a sweep current are used in spectrum analyzers. Even with the yig, when you hit the output amps with a saturation level sort of input power, you may see more harmonic energy 10 dbc than you would like.
One can easily achieve respectable phase noise performance with a fairly simple single or dualloop pll by tolerating the slow tuning speed, large size, high power consumption, and relatively high cost of a yig oscillator. This yig resonator is influenced by the magnetic field that is generated by the tuning coils. The gunn diode is mounted in a cavity tuned to resonate at twice the fundamental frequency of the diode. Raditek providing high quality, low cost wireless and microwave products. So, i bought a microlambda yto on ebay, advertised as 28 ghz. Yig is a ferrite with very high resistivity and a sharp ferrimagnetic resonance. The yig sphere behaves like a resonator with to8000 unloaded q. Electronically tunable over the entire 2to18ghz frequency range, a family of yigtuned oscillators employs thinfilm technology coupled with galliumarsenide gaas fieldeffecttransistor fet active devices for low phase noise. A wide band, low phase noise, differential yig tuned. Rf and microwave instruments, such as signal and network analyzers, require wideband, swept frequency signals to. Although the common gate fet yig oscillator has be t. C ommon gate fet oscillator the common gate fet oscillator circuit is the most common yig oscillator topology.
Consult gigatronics incorporateds yigtuned oscillator lpo030753001 brochure on directindustry. Yigbased solutions are usually simpler since the yig oscillator can mask many design imperfections. Yig tuned oscillator, 18000mhz min, 30000mhz max private private private private private private mhz. I have absolutely no data on it other than the pinout and operating voltage, which the seller was kind enough to include.
Miniyig oscillator 3 11 ghz center frequency yig tuned oscillator features low phase noise. The omniyig yom series provides fundamental yig tuned oscillator designs electronically tuned in octave and multi octave bands. Phase drift measurements of yigtuned oscillator sources. This is due to the typical submillimetre diameter of the spheres. Q avantek y ig tuned o scillato rs m illim eter band features a. The resonator is made of an yig yttrium, iron and garnet thin film magnetic resonance element formed by a thin film. Yig tuned oscillators exhibit a low level of phase jitter, and their broadband characteristics from approximately 2 ghz to 18 ghz with a very linear tuning curve make them a popular choice for many measurement applications. If so, this board would usually provide bias filtering, and this one looks to have part of the driver circuit as well. They have a standard pin configuration, which is almost always the same fig. Gunn oscillators are used as local oscillators for millimeterwave and submillimeterwave radio astronomy receivers.
Replacing yigtuned oscillators with silicon by using an ultrawideband pllvco with precision phase control. The yig ball, which sits at the tip of a short ceramic rod, is positioned in the middle of a coupling coil u bolt. Yig oscillator donald benson, ali tatari, amaaduddin, san jose state university fall 2009, ee 172 abstract a resonator based on yig yttrium iron garnet and a bipolar amplifier were implemented, targeting application as an oscillator in the yig to be tuned to its frequency. Experimenting with a stellex yig oscillator overview stellex 6755. A wide band, low phase noise, differential yig tuned oscillator. Noise measurements of yigtuned oscillator sources for the. Pdf design theory for broadband yigtuned fet oscillators. The superb linearity of these oscillators is contributed by the ideal design. Up to 1 ghz tuning range outstanding phase hit performance in 64 and 128 qam radio systems available in sma connectorized package specifications. Pdf design techniques that have been succcessfully used on the development of xband gaas fet yigtuned oscillators are presented.
The yig tuned oscillator tunes over the range 3910 mhz to 5947 mhz to mix the incoming signal to a. Oscillator designguide reference this manuals provides reference information on the use of the oscillator designguide. Bradley nrao, charlottesville, va 22903 24 august 2000 in this memo, we present measurements of the noise of yig tuned oscillators ytos at their fundamental. Replacing yig tuned oscillators with silicon by using an ultrawideband pllvco with precision phase control.
For a digitally controlled yig oscillator and filter, a driver is needed that can convert serial data from a microcontroller to a well defined, stable, and low noise current. Including all types of yig tuned oscillators, yig, yig tuned, ryto, ryad, rydd, analog driver, digital driver. Yigtuned oscillators a yigtuned oscillator consists of a yig sphere mounted on a rod that is positioned inside of a magnetic field. Including all types of yig tuned oscillators, yig, yig tuned, ryto. To date, exciting photons in a yig sphere has only recently been demonstrated in the optical regime using whispering gallery modes wgm 9, 10. Replacing yigtuned oscillators with silicon by using an. Noise measurements of yigtuned oscillator sources for the alma lo eric w. The magnetic field is generated by either a permanent or electromagnet.
Westinghouse fixed frequency, transmission type, vacuum sealed, reference cavity. Micro lambda wireless offers the largest yigtuned oscillator product line in the market. While everything was fine during my initial testing, the frequency display is now stuck with an outofrange display and the adjustable frequency range is limited to. Its hard to get a system to tune an octave or more and keep things like that from popping up. Permanent magnet and electromagnetic yigtuned oscillators. As i mentioned in my previous posting, there was an issue with my wavetek 907 microwave frequency generator. Yig based solutions are usually simpler since the yig oscillator can mask many design imperfections.
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