Raditek providing high quality, low cost wireless and microwave products. Switched or tuned filters of some sort generally creep into the design. Differential resonant ring yig tuned oscillator this oscillator can be used in cognitive radios and for satellite communications. A yig fil ter has been used to extend the tun ability of the oeo, while the spurious problem. In price charts, the %k line typically appears as a solid or bold line, and the %d line appears as a dotted or softer line. In this tutorial you will build and test a high frequency colpitts oscillator using a parallel resonant lc circuit. Teledyne microwave solutions yig products supplies both closedand openloop yig filters, yig oscillators, yig tuned. Nov 03, 2010 hello i have a hp8595a where the yig oscillator hp part nuber 50867833 is down frequentie. Pdf design techniques that have been succcessfully used on the development of xband gaas fet yigtuned oscillators are presented. For the setup of such components magnetically tunable resonators are being deployed. 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. Noise measurements of yig tuned oscillator sources for the alma lo eric w.
The sensitivity of this port is much less than that of the main. The yig sphere behaves like a resonator with to8000 unloaded q. This high q characteristics provides very low phase noise and multioctave frequency tuning. As major frequencydetermining component yig single crystals are applied. Gigatronics has 30 years of design experience to support your custom yig tuned oscillator and driver applications. Higher resolution documents consistently lead to better results. If you are trying to run 10 dbm, that might not be to bad. Microwave synthesizer modules yigtuned filters yig. Oscillators are often named by the type of resonator they employ, as shown in table 1.
Oscillator frequency ghz 12 teledyne microwave solutions yig to8oscillators exploit the principle of magnetic resonance to generate a clean low phase noise microwave signal over broad tuning ranges. The hartley oscillator is a particularly useful circuit for producing good quality sine wave signals in the rf range, 30khz to 30mhz although at the higher limits of this range and above, the colpitts oscillator is usually preferred. At normal signal generator type levels that gets pretty crazy pretty fast. Yig oscillator, low phase noise oscillators, mulitiplier. The omniyig yom series provides fundamental yig tuned oscillator designs electronically tuned in octave and multi octave bands. Yig tuned oscillators provide the lowest phase noise for broadband microwave applications. Oscillators are popular and widely used because they are leading indicators that can signal a possible trend change that is yet to start. 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. The yig ball, which sits at the tip of a short ceramic rod, is positioned in the middle of a coupling coil u bolt. This resonator is coupled to a lownoise active device to create an oscillator.
As such, interactions with magnons must be observed via. The yig filter is normally a reciprocal device, however specified bandpass. The story of how yig behaves is quite beyond the scope of this document, but it is highly interesting for. Find, read and cite all the research you need on researchgate. 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. Pdf design theory for broadband yigtuned fet oscillators. About the only way to be sure is to find amps that have a saturation level that is gulp 20 db above your operating point. A delay line in the delay line oscillator may be implemented with either a resonant circuit or a bandpass filter of sufficient bandwidth so that the output frequency and phase noise sidebands. The yig spheres themselves and the oscillator transistor in the yto can contribute drifts more than an order of magni tude greater than even an uncompensated magnet. The following is a list of parts needed for this part of the tutorial lesson.
Device parasitics which are not shown but would have to be used in any simulation, and considered in any explanation complete the oscillator. Yig filters and oscillators teledyne defense electronics. They have a standard pin configuration, which is almost always the same fig. Yto yig tuned oscillator and yig yttriumirongarnet. 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.
It has interesting magnetic properties which allow it to perform as a tunable microwave filter for example. Tmss yig products combine advanced technology and stateoftheart performance with sophisticated manufacturing techniques to ensure consistently high. Do not combine the control return and the bias return at the driver. We did not publish schematics for these microcircuits. A thn fr dnn yig ttrrn rnttnd trntr lltr tnbl vr th rn f frn fr 5 t 95 m prntd h pprh tn dffr pprbl fr tht d n th dn f nvntnl ctnd lltr on jr dffrn tht th yig tnn hn ltrll ntrlld h yig tnn lnt trtd nl nt nd nt rlvd nt n vlnt c rt intd drt thd n rfltn ffnt rd t ntr trnl t hrtrz vr dn t ppld h trntr l hrtrzd b rfltn nd trnn ffnt. Todays market requirements specifically, fast switching speed encourage the use of vcobased technologies, which, however, normally exhibit higher. Replacing yig tuned oscillators with silicon by using an ultrawideband pllvco with precision phase control. China yig oscillator, find details about china yig broad band yig tuned oscillator, standard band yig tuend oscillators from yig oscillator mayland technology limited. It mentions yig oscillator application note and vendorsmanufacturers of yig oscillator.
Unloaded qs of 50,000 to 70,000 are attained for te023 or te025 modes, but this moderately highq. I have used an oldstyle microwave counter to stabilize a yig oscillator at xband. Yig single crystals are most commonly used for the construction of electronically tunable oscillators yig oscillator and filters. The basic approach used in the past at nist consists of. Request pdf yig tuned oscillator design on printed circuit board using surface mount technology previously most of microwave circuits were designed based on thin film or thick film technologies. Foster and stephen vitkovits page 2 microcircuits for.
The primary objective of this tutorial lesson is to underline the challenges of analyzing oscillator circuits. Yig tuned oscillator yto yig tuned filter ytf driver. Because of high frequencies, small inductance can be used for the radio frequency of oscillation. The power consumption and size of yig tuned oscillators generally do. The present disclosure relates to a high frequency yttrium iron garnet yig oscillator as well as a method of manufacturing a high frequency yig oscillator. This type of indicator oscillates between two limits, above and below a midpoint and its value helps to gauge the strength and momentum of a trend. Another yig application is yig oscillators, where the sphere acts as a tunable frequencydetermining element. Yig filters tuned by a sweep current are used in spectrum analyzers. The 10 ghz yig source has a selectable frequency output from 3 ghz to 10 ghz. Yig oscillator basics yig oscillator app note,vendors.
Yig is a very interesting microwave material with properties that can be substantially modified by the application of a strong magnetic field. The common gate fet oscillator circuit is the most common yig oscillator topology. This allowed the team to work on them independently, characterize them, simulate how. Yttrium iron garnet yig is a synthetic crystal that offers very high q characteristics. Choice of external reference oscillator choosing external reference bandwidth optimizing for closein or wide offset noise optimizing for broadband noise optimizing for low frequency coverage noise subtraction, including phase noise subtraction read documentation, specs for productspecific optimization choices 37. A spinwave filter made with an yttriumiron garnet yig film was used simultaneously as a frequency. 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. But the noise performance of a vco is considerably worse than that of a yig oscillator, which may restrict using a vco in highperformance designs. Types of oscillators fixed frequency or voltage controlled oscillator lc resonator ring oscillator crystal resonator relaxationmultivibratorrc oscillators 3.
In addition, the size, power consumption, and cost of vcos are generally much lower compared to yig devices. Positive feedback amplifiers oscillators lc and crystal. This additional material on yig technology just in from james, a semiconductor guy with some rf test experience. An internal precision quartz oscillator at 100 mhz generated harmonics through a comb generator, to which the resonator was tuned. Oscillators university of california, santa barbara. 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. Generation of coherent spinwave modes in yttrium iron. China yig oscillator china yig broad band yig tuned. Set the analyzer to 1 ghz center frequency and zero span. We would like to show you a description here but the site wont allow us. 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 is actually a synthetic form of garnet.
The fast stochastic oscillator compares two lines called the %k and %d lines to predict the possibility of an uptrend or a downtrend. Oscillator types resonator oscillator name cavity high q or stable yig yto yig tuned oscillator varactor vto voltage tuned oscillator lossless transmission lines distributed or microstrip oscillator. It is coupled to an amplifier which provides the required feedback for oscillation. This entry was posted on friday, november 30th, 2018 at 9. A magnetically tunable microwave spinwave photonic oscillator was designed and modeled. The designers used a small light bulb shown in the.
This is due to the typical submillimetre diameter of the spheres. Yig oscillator50867500 schematic for 83752b keysight. Us7005927b2 low noise yig oscillator based phase locked. Pm noise of a 40 ghz airdielectric cavity oscillator. A low phase noise yig oscillator based phase locked loop couples an output frequency to a delay line discriminator to provide a phase noise feedback signal to a wideband tuning port of the yig oscillator. Although the common gate fet yig oscillator has be tter. A classic example is the vacuum tube wien bridge oscillator that was the founding product of hewlettpackard corp. Its hard to get a system to tune an octave or more and keep things like that from popping up.
By combining the yigs linear tuning property with the broad band oscillation of the bulk. This rather large autooscillation linewidth is also consistent with a small precession angle, that is, a small stored energy in the yig oscillator 31. This will usually be a voltage amplifier and may be biased in class a, b or c. Part of our product reengineering group focuses exclusively on rhythm assemblies for the agilent hp 8560 series spectrum analyzers. Replacing yigtuned oscillators with silicon by using an. The collector voltage is in phase with the input for a common base configuration. At national test equipment we have a highly experienced team dedicated to some of the most intense microwave component repair imaginable. Yig drivers for the above models are supplied in one integral package with oscillator. They tune faster than yig oscillators, typically in the microsecond range. The circuit provides stable tuning current which is substantially noise free. This oscillator uses an lc resonator to set the oscillation frequency and a capacitive divider to establish the loop gain. Yig products from teledyne microwave solutions tms teledyne microwave solutions yig products formerly ferretec products has a long history of supplying yig products and is known as the industrys leading supplier. Sep, 2011 hi pete b the 50867500 is a dual yig oscillator that is a sealed microcircuit and is not field repairable.
Yig oscillator connections the connections of a yig oscillator are shown in the circuit. Sweeping the microwave spectrum with solidstate sources, by robert h. We propose a novel technique for building yig filmbased resonators and. Tms has both inhouse and offshore yig manufacturing capabilities to control costs and meet stringent capacity and deliver requirements for nonitar products.
As i mentioned in my previous posting, there was an issue with my wavetek 907 microwave. Pdf a wideband doublepll microwave frequency synthesizer. Perpendicularly magnetized yigfilm resonators and waveguides. 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. Although the common gate fet yig oscillator has be tter phase noise than most other technologies e. Yig is a ferrite with very high resistivity and a sharp ferrimagnetic resonance. Dont compress your scans before running the ocr process. The goal is to determine the conditions where the open.
Background it is known from the state of the art that yig oscillators are used as reference sources for generating a signal of a local oscillator which may be used in a signal generator. Jii packard slide 10 tunable oscillators vco and yig tunable oscillators lnp. Design of oscillators frequency control, stability amplitude limits buffered output isolation bias circuits voltage control. Oscillator designguide reference this manuals provides reference information on the use of the oscillator designguide. A typical analogdriver control input of 0 to 10 v tunes the oscillator over the full frequency band. It is a circuit that produces a repetitive waveform on its output with only dc supply as input. This project began as development of a yig based oscillator. Vida products is a leading innovator of highperformance, surface mount, lowpower, small size, and low phase noise oscillators and filters. To date, exciting photons in a yig sphere has only recently been demonstrated in the optical regime using whispering gallery modes wgm 9, 10. Yigtuned oscillator design on printed circuit board using.
Yig oscillators and filters have been designed without the beryllium. 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. Inser ted in b is the large signal equivalent circuit of a differential pair from chap. Microwave oscillators started with vacuum tubes and pretty. Foster and stephen vitkovits page 2 microcircuits for the microwave sweeper, by ronald e. Oscillator design using modern nonlinear cae techniques fliohewlett 3 i. Wavetek 907 repair, yig oscillator teardown kerry d. This yig resonator is influenced by the magnetic field that is generated by the tuning coils. It was decided to make a yig resonator and an amplifier as separate circuits with rf connectors. Gaas oscillator to tune an octave frequency band and, with only a. Aug 03, 2014 wavetek 907 repair, yig oscillator teardown. If you have your yig oscillator out of the rf deck, reconnected to the power cable and turned on. Noise measurements of yigtuned oscillator sources for the.
Tuned oscillator is a circuit that generates a radio frequency output by using lc tuned resonant circuit. The old hp counters had a microwave plugin unit in which a manually tuned resonator was used, with a discriminator output. A stable, low noise voltagetocurrent converter is provided to control the tuning current in yig tuned devices such as yig tuned transistor oscillators. The frequency range of up to 6 ghz was selected based on lab equipment available to students at sjsu. Careful alignment of the yig spheres anisotropic field and the use of heaterregulators greatly reduce. The synthesizer is based on a yig tuned oscillator yto, a. These units feature a novel coupling technique to provide maximum rf power output and a lower second harmonic and other spurious responses.
Miniyig oscillator 3 11 ghz center frequency yig tuned oscillator features low phase noise. Standard 1 cube oscillator with digital driver outline drawing no. Rf and microwave instruments, such as signal and network analyzers, require wideband, swept frequency signals to. A yig crystal sphere looks like a high q lc circuit whose resonant frequency is linearly proportional to an externally applied magnetic field. Unfortunately we cant guarantee 100% accuracy on the recognized text, this is a besteffort. The oscillator is tuned by a current through a single turn loop through an octave or more in the ghz range. Including all types of yig tuned oscillators, yig, yig tuned, ryto, ryad, rydd, analog driver, digital driver. I sourced for an alternative yig that should be a close match 50867259 yig oscillator. Miniaturizedstandard and fast switching multioctave designs yig oscillators 0.
The oscillator can be sinusoidal or nonsinusoidal type. Avantek octave band series yig tuned fundamental transistor oscillators are compact and lightweight and are costeffective. Experimenting with a stellex yig oscillator overview stellex 6755. The superb linearity of these oscillators is contributed by the ideal design. The input circuit, the 3rd, and the yig filters input coupling. You can follow any responses to this entry through the rss 2. The fast stochastic oscillator can be used effectively to. 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.
616 984 1532 1067 758 804 1284 556 409 256 1491 1540 1087 506 687 697 1233 1303 1266 1582 1248 1434 1342 681 1389 1442 991 1595 737 1535 177 10 1427 1412 776 428 1056 458 1000 1224 1252 763 242 865 632 89 978 1474 18 514