A tuning circuit for a yig oscillator 1, wherein the output frequency f of the yig oscillator 1 which is reduced by a frequency divider 2 or mixer is compared in a phase detector 3 with a lower reference frequency f r and via a loop filter 5 the output voltage u of the phase detector 3 feeds the aircored coil 7 of the yig oscillator 1 serving for fine tuning, characterised in that the main coil 6 of the yig oscillator 1 is also fed by the output voltage u of the. Products has a long history of supplying yig products and is known as the industrys leading. Notes on stellex yig synthesizer performance and control. Yig filters are used for their high q factors, typically between 100 and 200. They have a stand ard pin configuration, which is almost always the same fig. Yig based solutions are usually simpler since the yig oscillator can mask many design imperfections. The yig tuning element is treated as a single unit and is not resolved into an equivalent lc circuit. Bandwidth of the circuit should be a few 100 hz, and maximum current in the 300 ma range, so it needs to run of a reasonably high supply voltage, otherwise, the inductance. Raditek providing high quality, low cost wireless and microwave products. The common gate fet oscillator circuit is the most common yig oscillator topology. The oscillator circuit associated with the common base.
His background in engineering, physics, psychology and integration of mind and body has created a unique way of looking at the markets. This oscillator uses an lc resonator to set the oscillation frequency and a capacitive divider to establish the loop gain. The oscillators are a cheap way to generate very high. We did not publish schematics for these microcircuits. Yig oscillator basics yig oscillator app note,vendors. Compact, widely tunable, halflambda yig oscillator request pdf. The combination of the high q and broadband tuning range of the. The differential output from the transistor pair is a perfect. The goal is to determine the conditions where the open. One particular device of interest is the spin toque oscillator, which is a nanoscale source of microwave power.
This high q characteristics provides very low phase noise and multioctave frequency tuning. Williams, a leader in the selfeducation of investors first began trading in 1959. A wide band, low phase noise, differential yig tuned. Fortunately, it has an external tune voltage 0 10 v dc so im looking for a way to phase lock the output and then output a proper tune voltage. Core element is a small yig sphere, placed in a magnetic field.
Including all types of yig tuned oscillators, yig, yig tuned, ryto, ryad, rydd. 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. Although the common gate fet yig oscillator has be tter phase noise than most other technologies e. With the selector switch in the off position, a large. Teledyne microwave solutions yig products formerly ferretec. Pdf design techniques that have been succcessfully used on the development of xband gaas fet yigtuned oscillators are presented.
Fabrication of nanoscale spin torque oscillator based on. Yig oscillators are well known for broadband configurable signal source but at the cost of size, power and integrability in ic form. Request pdf a wide band, low phase noise, differential yig tuned oscillator yig tuned oscillators yto offer an unbeatable combination of broad band electronic tuning and. Yig is a very interesting microwave material with properties that can be substantially modified by the application of a strong magnetic field. These units feature a novel coupling technique to provide maximum rf power output and a lower second harmonic and other spurious responses.
Aug 03, 2014 the center of the yig oscillator is protected and shielded by a small piece of copper on the top. The average output power of the yig is dbm in my frequency span of interest. Including all types of yig tuned oscillators, yig, yig tuned, ryto, ryad, rydd, analog driver, digital driver. Jul 21, 2019 an oscillator is a circuit which produces a continuous, repeated, alternating waveform without any input. A wide band, low phase noise, differential yig tuned oscillator. The ultimate stellexminiyigsynthesizer controller l. Yig single crystals are most commonly used for the construction of electronically tunable oscillators yig oscillator and filters. It has interesting magnetic properties which allow it to perform as a tunable microwave filter for example.
Any luck purchasing yig tuned oscillators from ebay. Aug 26, 2019 avantek k band yig oscillator yo ghz with isolator ebay aantek satisfied that the module would behave somewhat as expected, i hooked it up to a spectrum analyzer. The story of how yig behaves is quite beyond the scope of this document, but it is highly interesting for. Yig oscillator50867500 schematic for 83752b keysight. Sep, 2011 hi pete b the 50867500 is a dual yig oscillator that is a sealed microcircuit and is not field repairable. Pdf milc45662 s126 17173silabs s163 812 ghz yig tuned oscillator pm7015x pm7892 sivers yig yig oscillator hp electromagnetic pulse generator jammer pm7288x pm7101x xband waveguide isolators 812 ghz yig tuned filter. The collector voltage is in phase with the input for a common base configuration. After carefully removing the thin copper cap, we can see the core of the yig oscillator. Request pdf a wide band, low phase noise, differential yig tuned oscillator yig tuned oscillators yto offer an unbeatable combination of broad band electronic tuning and extremely low phase. Yig is a very interesting microwave material with properties that can be substantially modified by the application of a strong. Theyre intended for use with the stellex endwave 6755725f and 6755726f ytos, also widely available on ebay, but are easily modified for use with other yto models.
Tms has both inhouse and offshore yig manufacturing capabilities to control costs and meet stringent capacity and deliver requirements for nonitar products. Yigbased solutions are usually simpler since the yig oscillator can mask many design imperfections. Device parasitics which are not shown but would have to be used in any simulation, and considered in any explanation complete the oscillator. The oscillator is the active device, the sustaining device that adds power, with a loop coupled to the yig sphere tunable resonator in one terminal, to control its frequency of oscillation. They have a standard pin configuration, which is almost always the same fig. Pdf design theory for broadband yigtuned fet oscillators. The superb linearity of these oscillators is contributed by the ideal design. His background in engineering, physics, psychology and integration of mind. From the picture below, you can clearly see the orthogonal coupling wires around the yig sphere click to see the picture in higher resolution. A simple approach to yig oscillators vhf communications magazine. Spintorque oscillator in an electromagnet package article pdf available in ieee transactions on magnetics 4811. I have put some thought into this, and i plan to do it like this.
The center of the yig oscillator is protected and shielded by a small piece of copper on the top. A yig sphere placed at the center of a coupling loop served as a resonator to the transistor emitter. If you have your yig oscillator out of the rf deck, reconnected to the power cable and turned on. It mentions yig oscillator application note and vendorsmanufacturers of yig oscillator. Yig tuned oscillator yto yig tuned filter ytf driver. Instead, a direct method using reflection coefficients measured. Pdf milc45662 s126 17173silabs s163 812 ghz yig tuned oscillator pm7015x pm7892 sivers yig yig oscillator hp electromagnetic pulse generator jammer pm7288x pm7101x x. Set the analyzer to 1 ghz center frequency and zero span. Pdf spintorque oscillator in an electromagnet package. The fundamentals of signal generation electronic design. Jii packard slide 10 tunable oscillators vco and yig tunable oscillators lnp.
The basic principle behind the working of oscillators can be. Us20020005762a1 tuning circuit for a yig oscillator. Stabilize yig oscillator this yig generator runs from 2 ghz to 8 ghz but is highly unstable old marconi type generator and often drifts several mhz in a few seconds. Unlike conventional signal sources oscillatorsvcos, a yig. Wavetek 907 repair, yig oscillator teardown kerry d. The permanent magnet is tuned at the factory to a cu s tomer selected free running frequency. Yto yig tuned oscillator and yig yttriumirongarnet. The yig ball, which sits at the tip of a short ceramic rod, is positioned in the middle of a coupling coil u bolt. I have a couple of avantek yig oscillators, models sf6 and avm both are 2 4 ghz units.
Avantek k band yig oscillator yo ghz with isolator ebay aantek satisfied that the module would behave somewhat as expected, i hooked it up to a spectrum analyzer. 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. Print version of this book pdf file oscillator core examples oscillator cores cclappcore, chartleycore, cmodifiedclappcore, and cmodifiedcolpittscore are compatible with simulation and measurement setups outlined by the generic oscillator example. In this study, a spin torque oscillator based on the insulating material. I sourced for an alternative yig that should be a close match 50867259 yig oscillator. A typical 8 18 ghz yig oscillator has a main tuning coil sensitivity of 20 mhzma. One can easily achieve respectable phase noise performance with a fairly. We demonstrate a new yigtuned oscillator yto design based on a planar yig resonator that supports halflambda standing spin wave. Oscillator design using modern nonlinear cae techniques fliohewlett 3 i. Yig is a ferrite with very high resistivity and a sharp ferrimagnetic resonance. Oscillators basically convert unidirectional current flow from a dc source into an alternating waveform which is of the desired frequency, as decided by its circuit components. For the setup of such components magnetically tunable resonators are being deployed.
Costeffective, powerefficient and configurable yig. The controller scheme presented here is the ultimate plug and play solution for the rf minded ham that dont want to spend any time on digital and softwaremicrocontroller. The omniyig yom series provides fundamental yig tuned oscillator designs electronically tuned in octave and multi octave bands. For startup of the oscillator, it is required that there be gain negative resistance. This additional material on yig technology just in from james, a semiconductor guy with some rf test experience. Rather than writing down all the numbers, a quick test setup, with two power supplies, an eip 545a counter with builtin power meter, an agilent 66319d power supply used as current source for the main tune and fm coils of the yto, a 14. The connections of a yig oscillator are shown in the circuit.
The yig sphere behaves like a resonator with to8000 unloaded q resulting in very good frequency stability. This will usually be a voltage amplifier and may be biased in class a, b or c. The circuit file is shown in figure 2, along with the output file. With a good number of yig oscillators ytos around, time for a few tests. 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. Cts knights 97037570 octal base plugin oscillator similar to above, also 100 khz. With a 30 year heritage in yig technology, tms has unsurpassed capabilities as your single source for yig. This makes the modules tuning behavior more like the next lower range, for example the av simonsdialogs a wild collection of random thoughts, observations and learnings. This yig resonator is influenced by the magnetic field that is generated by the tuning coils. As major frequencydetermining component yig single crystals are applied. Designs covering frequency ranges from 500 mhz to 44 ghz in either narrow band or wide band con.
527 730 1388 216 499 14 197 167 1217 685 324 299 688 1264 212 809 104 422 160 598 725 664 358 127 1115 1059 1135 407 1021 455 742 850 92 941 401 1498 1415 101 579 1153 1209 998 427 650 525 303 1229 817 745