Teledyne microwave solutions is pioneer in design, development and manufacturing of yig oscillators. Teledyne defense electronics, llc with a 30 year heritage in yig technology, tms has unsurpassed capabilities as your single source for yig oscillators and offers best in industry low phase noise. They have a stand ard pin configuration, which is almost always the same fig. Yigbased solutions are usually simpler since the yig oscillator can mask many design imperfections. Pdf design theory for broadband yigtuned fet oscillators. 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. The center of the yig oscillator is protected and shielded by a small piece of copper on the top. General equivalent circuits for rf oscillators the procedure is to design an active negative resistance circuit which, under largesignal steadystate conditions, exactly cancels out the load and any other positive resistance in the closed loop. Yigtuned oscillator design on printed circuit board using.
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. Broadband, electronics, frequency synthesiser, microwave, microwave circuit design, microwave packaging. Yigtuned oscillators provide the lowest phase noise for broadband microwave applications. The resonator in a yig tuned oscillator yto is a sphere of. The minimum output power from this device operating into a. Replacing yigtuned oscillators with silicon by using an ultrawideband pllvco with precision phase control. The problem is the correct design of the current driver coil fm and tune. 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. If we can design an amplifier for which k pdf rf and microwave instruments, such as signal and network analyzers, require wideband, swept frequency signals to make many of their basic measurements. Raditek providing high quality, low cost wireless and microwave products. These different yig oscillator topologies are depicted in the figure1 above. It has interesting magnetic properties which allow it to perform as a tunable microwave filter for example. Aug 03, 2014 the center of the yig oscillator is protected and shielded by a small piece of copper on the top. The superb linearity of these oscillators is contributed by the ideal design.
A spinwave filter made with an yttriumiron garnet yig film was used simultaneously as a. The following is a list of parts needed for this part of the tutorial lesson. We report here on the design and construction of a yig tuned fet oscillator tunable over the entire 818ghz frequency range. The frequency of the output wave may be fixed or variable, depending on the oscillator design. Yig oscillator basics yig oscillator app note,vendors. In this tutorial you will build and test a high frequency colpitts oscillator using a parallel resonant lc circuit.
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. These units feature a novel coupling technique to provide maximum rf power output and a lower second harmonic and other spurious responses. Miniaturizedstandard and fast switching multioctave designs. Apr 10, 2011 yig based solutions are usually simpler since the yig oscillator can mask many design imperfections. Its hard to get a system to tune an octave or more and keep things like that from popping up. Yig is a ferrite with very high resistivity and a sharp ferrimagnetic resonance. The connections of a yig oscillator are shown in the circuit.
Replacing yigtuned oscillators with silicon by using an. Low phase noise gan hemt oscillator design based on highq. Also, aspecial design enablesveryfasttuning with a 3dbbandwidth of typically 2. Because of high frequencies, small inductance can be used for the radio frequency of oscillation. Attime t o,weclosethe switch,s,therebyconnectingthecapacitoracrosstheinductor,l. Simple conceptual oscillator i assumethecapacitorcischargeduptoastaticvoltagevo. First a 3db attenuator, just to make the rest look more like 50r. Controlled oscillators vco, except they require a constant tuning current rather than a constant voltage. Positive feedback amplifiers oscillators lc and crystal. If you let me know what measurements youd like i can take some for you. A simple approach to yig oscillators vhf communications magazine. The average output power of the yig is dbm in my frequency span of interest.
Lc oscillator tutorial and tuned lc oscillator basics. After carefully removing the thin copper cap, we can see the core of the yig oscillator. A technique for designing yig yttriumiron garnet tuned transistor oscillators, tunable over the range of frequencies from 500 to 950 mhz, is presented. Pdf design techniques that have been succcessfully used on the development of xband gaas fet yigtuned oscillators are presented.
Yttrium iron garnet spheres yig spheres serve as magnetically tunable filters and resonators for microwave frequencies. Sep, 2011 hi pete b the 50867500 is a dual yig oscillator that is a sealed microcircuit and is not field repairable. Oscillator design using modern nonlinear cae techniques fliohewlett 3 i. The omniyig yom series provides fundamental yigtuned oscillator designs electronically tuned in octave and multi octave bands. I have put some thought into this, and i plan to do it like this. Lecture 15 microwave oscillator design microwave active. The omniyig yom series provides fundamental yig tuned oscillator designs electronically tuned in octave and multi octave bands. A magnetically tunable microwave spinwave photonic oscillator was designed and modeled. And under the concept of modification of pcb rf in stellex see picture. A similar oscillator with a mechanicall y tuned cavity has about 3 db better phase noise. Despite a small degradation in phase noise, the simplicity facilitated with electronic tuning motivates this design for practical applications. The wave shape and amplitude are determined by the design of the oscillator circuit and choice of component values. Tunedinput and tunedoutput oscillator tunedoutput tunedinput feedback coupling ci rf output c 2 c 1 l 1 2 c co c l 2 1 2 0 2 1 1 l c f s.
The yig sphere technology has been used for microwave oscillators for more than. The yig sphere behaves like a resonator with to8000 unloaded q resulting in very good frequency stability. The minimum output power from this device operating into a 50omega. The yig oscillator at 10 ghz is a commercial one that allows voltage tuning over a 1ghz range. We can provide yig oscillators with 40 dbc second harmonic. The frequency of the oscillatory voltage depends upon the value of the inductance and capacitance in the lc tank circuit. Micro lambda wireless offers the largest yigtuned 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. We now know that for resonance to occur in the tank circuit, there must be a frequency point were the value of x c, the capacitive reactance is the same as the value of x l, the inductive reactance x l x c and which will therefore cancel out each other out leaving. Including all types of yig tuned oscillators, yig, yig tuned, ryto, ryad, rydd, analog driver, digital driver. A sphere made from a single crystal of synthetic yttrium iron garnet acts as a resonator. 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. This resonator is coupled to a lownoise active device to create an oscillator.
A miniaturised wideband frequency synthesiser qut eprints. This discussion of amplifier design gives us some insight into how to design an oscillator from small signal sparameters. Hp modular products are designed to be cascaded in a 50 microstrip system. In this paper, a yigtuned oscillator with low phase noise is designed successfully, the frequency range of 3 to 10 ghz, which is based on the theory of oscillation phase noise model and yttrium iron garnet yig spheres characteristic. Gigatronics has 30 years of design experience to support your custom yigtuned oscillator and driver applications. A spinwave filter made with an yttriumiron garnet yig film was used simultaneously as a frequency. Yig drivers for the above models are supplied in one integral package with oscillator. Although the common gate fet yig oscillator has be tter phase noise than most other technologies e. The design of one yig oscillator is not readily scalable to a nonstandard package or frequency. Design of a 310 ghz low phase noise yigtuned oscillator.
We did not publish schematics for these microcircuits. The common gate fet oscillator circuit is the most common yig oscillator topology. The commongate fet oscillator circuit is the most common yig oscillator topology. Experimenting with a stellex yig oscillator overview stellex 6755.
Synthesizers, voltage controlled oscillators, coaxial resonator oscillators, yig replacement oscillators, and various custom design signal sources engineering and design expertise providing leading edge synthesizer and vco solutions to our customers. Switched or tuned filters of some sort generally creep into the design. November 20, 2000 10 ghz phaselocked yig source rev. The fracn can be used with a reference oscillator up to 50 mhz, and operates at a frequency of up to 6. Wavetek 907 repair, yig oscillator teardown kerry d. Yig oscillator50867500 schematic for 83752b keysight. Yig filters are used for their high q factors, typically between 100 and 200. Jii packard slide 10 tunable oscillators vco and yig tunable oscillators lnp. The yig ball, which sits at the tip of a short ceramic rod, is positioned in the middle of a coupling coil u bolt.
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