Yig tuned filters driver circuit

Yig tuned filters with military serial drivers poweron reset the mlwi digital driver has a poweron reset circuit to set the dacs output to ovfmin in unipolar mode when vdd is first applied. The number of spheres stages determines the filter bandwidth and tuning range. A subsequent bandpass filter selects the desired harmonic frequency and removes the. In special cases, speedup circuits like those used to improve tuning speed of yigoscillators can be included to provide both fasttuned and with good accuracy. Gigatronics has different configurations covering many microwave frequency bands in a variety of package styles with many driver options. Dec 29, 2010 based on micro lambda wireless yig tuned filter devices, the mlbf series of benchtest filter assembliescovers a frequency range from 500 mhz to 50 ghz in both bandpass andbandreject versions. The band reject filter comprises one or more ferrimagnetic spheres shielded from each other by placement in nonmagnetic, electrically conductive cavities in a block placed in the flux gap of a tuning magnet. The main reason for all these drawbacks is the use of inductor in the filter circuit. In special cases, speedup circuits like those used to improve the tuning speed of yig oscillators can also be included to provide both fast tuned filters and with good accuracy. If we use a resistance in series, instead of the inductor as the filter, these drawbacks can be overcome. Yig tuned filters use several spheres for a high order filter. In addition, since the spectrum analyzer is a tuned receiver, measurements are not affected by spurious signals or harmonics. Introduction this project began as development of a yig based oscillator.

A broadband yig tuned oscillator is disclosed that has both series and parallel feedback provided by a yig sphere. Wirebonding, the key to microwave and millemeterwave. If theres more than one sma connector, its almost certainly a filter. Tracking yig tuned filtermixer hewlettpackard company. Micro lambda drivers eliminate the need for customers to design or develop their own driver circuits and sophisticated test and alignment procedures. Elva1 yig tuned bandpass filters cover octave and multioctave frequency band from 1 to 37. Yigtuned oscillator design on printed circuit board using. Finally, id like to mention two other types, although they are rare. In practical yig tuned oscillators and filters, the magnetic field is derived from an electromagnet and the resonant frequency of the yig sphere is proportional to the current flowing through the magnetic coil. There are three broad categories of filter which are widely used. Is it possible to use a yig tuned filter to make a yig. 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. Figure 1 shows the block diagram of a conceptual signal generator.

Design aspects of a linear, stabilized voltage to current transducer for driving yig tuned microwave devices are analysed. Tracking yig components tracking the yto harmonic with the singlepole yig tuned filter proved to be a. This additional material on yig technology just in from james, a semiconductor guy with some rf test experience. Field coils produce a magnetic tuning field that is uniform over the four yig resonators. Yig drivers act as digital wordtocurrent convert, converting standard 12 bit binary numbers into ma of current to tune a magnetic tuning coil. It is coupled to an amplifier which provides the required feedback for oscillation. These yig filters offer excellent tuning linearity, good frequency stability, excellent selectivity and offresonance rejection. Teledyne defense electronics, llc teledyne microwave solutions tms delivers high quality yig products including closed and open loop yig filters, yig oscillators, yig tuned harmonic generators, and yig based integrated receiver frontendstuners. Yig filter can be maximized down to the component level. Gigatronics has different configurations covering many microwave frequency bands in a variety of package styles with many driver. Jun 22, 1993 in april 1989, the then existing state of the prior art in yig tuned notch filter design was summarized by w.

Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. Frequency switching speed in microwave signal generators. Micro lambda yig filters, model types mlfp series and mlfrseries are available with integrated analog driver circuits. The ytm from the hp 867x series ive seen all had a destroyed yig coupling loop on output circuit.

A drive circuit for the pretune coil could be nothing more than an npn pass transistor operated as an. These band passband reject yig filters consist of two units designed and integrated under a common tuning magnetic circuit. Bandwidth of the circuit should be a few 100 hz, and maximum. Raditek providing high quality, low cost wireless and microwave products. This application note assumes that the user is familiar with the fundamentals of yig oscillator and filter tech nologies see y ig oscillator, and yig filter technical.

Micro lambda yig filters, model types mlfp series and mlfrseries are available with integrated digital driver circuits. The oscillator includes a transistor capable of driving a load coupled to a first port of the transistor, a reactive feedback element coupled to a second port of the transistor, a yig resonator, and coupling means for coupling the yig resonator to both a third port of the. Lots of microwave circuit design needed for filter bank expensive, the chip itself is eur 58, and then comes all the switches rogerslike board needed for. Elva1 produces bandpass yig tuned filters of eyf series. Yig tuned filters a yig tuned filter consists of multiple yig spheres as filter elements. A filter is a circuit whose transfer function, that is the ratio of its output to its input, depends upon frequency. Az components home about service department suppliers products.

A filter circuit is in general a combination of inductor l and capacitor c called lc filter circuit. As will be discussed shorty, in some embodiments, the invention may comprise a combination yig based, closedloop signal filtering filter and amplitude control e. Micro lambda yig filters, model types mlfp series, mlfrseries and mlfrdseries are available with integrated digital driver circuits. This high q provides very low phase no ise in oscillators and multi octave frequency tuning for both oscillators and filters. These measurements have the advantage of high dynamic range and speed. To remove the ac components or filter them out in a rectifier circuit, a filter circuit is used. Unless you take the filter apart and assemble the amplifier on the coupling to the spheres, the electrical length in and out of the filter will dominate the phase shift round a sustaining amplifier, meaning you will probably need additional switchable phase shift to be able to oscillate at all frequencies. C components of the rectified output, but allows the d. Make sure you know the difference between a yig oscillator and a yig filter. A tracking yig tuned filter mixer circuit is provided. Yigtuned front ends for ecm front ends for ecm, octave and multioctave discriminators, integrated local oscillator with prepostselector yig filters the superb tracking of the yig oscillator versus the yig filter is attributed by the ideal design of the magnetic circuit and the coupling technique used between yig sphere and active elements.

Angt143a frequency switching speed in microwave signal. The yig is mounted on a small piece of art foam to help avoid any microphonics from vibrations. Digitally tunable bandpass filter computer control tunes this versatile bandpass filter to meet changing requirements. The filters benefit from the highquality factor highq properties of yig spheres, which can be tuned within an electromagnetic em field by means of an applied current. Note that yig filters can be configured as either bandpass filters or notch filters. Yig tuned oscillator using composite feedback avantek, inc. Yig tuned band reject filter for 218 ghz with full one. If you havent already, its also worth looking into what is required to drive a yig oscillator its not just a rail, you need. Yig tuned filters with commercial digital drivers pd series continued bandpass filters with positive input digital drivers 0. These are then usually tuned with a tuning voltage of between 0 and 10v. In electronics, a frequency multiplier is an electronic circuit that generates an output signal whose output frequency is a harmonic multiple of its input frequency.

Lc oscillator tutorial and tuned lc oscillator basics. Improving power leveling range of microwave signal source using dualslope logarithmic amplifier by loo choo khiam thesis submitted in fulfillment of the requirements for the degree of master of science engineering december 2007. Yig is a ferrite with very high resistivity and a sharp ferrimagnetic resonance. Micro lambda drivers eliminate the need for customers to design or develop their own driver. In order to maintain oscillations called frequency stability the voltage applied to the tuned circuit must be inphase with the oscillations occurring in the tuned circuit. All amateur radiorelated projects, tips, tricks, and tools. The yig filter has a yttrium iron garnet sphere that is tuned with a magnetic field. Yig oscillator connections the connections of a yig oscillator are shown in the circuit. Yigtuned filters a yigtuned filter consists of multiple yig spheres as filter elements. This allowed the team to work on them independently, characterize them, simulate how. For yig band pass filters and yig tuned oscillators see. The butterworth filter is generally used in audio system which is characterized by a maximally.

In environ ments with large amounts of electromagnetic. Including all types of yig band pass, filters, yig tuned filters, rybpf, ryad, rydd, analog driver, digital driver, rybpffb, filter bank. Us5418507a yig tuned high performance filters using full. Yig filters and oscillators teledyne defense electronics. Sep 20, 2016 yig filters and oscillators brochure source. Analog and digital drivers are available for all ferretec yig products.

Yig filters tuned by a sweep current are used in spectrum analyzers. It has interesting magnetic properties which allow it to perform as a tunable microwave filter for example. Jan 11, 2015 what is a filter circuit a rectifier is actually required to produce pure d. So, i bought a microlambda yto on ebay, advertised as 28 ghz. Yig crystals are grown, similar to sil icon crystals. Avantek yf850107 yig filter artisan technology group. Yto yig tuned oscillator and yig yttriumirongarnet. Integrated circuits ics interface filters active are in stock at digikey. Ryad ryadi3 specifications may be subject to change 021411 world hq. A microwave filter using yig sphere as the resonant element. This application note assumes that the user is familiar with the fundamentals of yig oscillator and filter tech nologies see y ig oscillator, and yig filter. Dec 12, 2017 as will be discussed shorty, in some embodiments, the invention may comprise a combination yig based, closedloop signal filtering filter and amplitude control e. Filter circuits inductor filter, lc filter, clc or pi. When the circuit is oscillating its impedance is resistive and the collector and base voltages are 180 o out of phase.

In addition, the yig control circuitry must be very stable with temperature and time and must compensate for the tuning errors in herent in magnetically tuned devices. Each unit comprises a tunable filter, an ac power supply,a heat sink with fan, a 16key dataentry keypad, a mechanical tuning knob, a. 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 of the coil will limit the slew rate. This yields filter driver combinations set at the factory with excellent frequency accuracy performance. Pass band reject yig filters are electronically tunable in octave andor multioctave frequency range from 500 mhz to 18 ghz. 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. Frequency multipliers consist of a nonlinear circuit that distorts the input signal and consequently generates harmonics of the input signal. Mounting of the yig and the tuning driver circuit board. Audio filter circuit can be formed by simple cascading high pass filter circuit and low pass filter circuit and is generally the choice for simplicity of design and performance through such a circuit can be realized by number of possible circuit. Same day shipping on all tunable filter designs in stock at quest components. In the preferred embodiment, four yig tuned resonators are combined to provide a tracking filter mixer with a switched input. Yig tuned oscillator yto yig tuned filter ytf driver. Lowpass filters allow any input at a frequency below a characteristic frequency to pass to its output unattenuated or even amplified.

Teledyne microwave solutions yig products supplies both closedand openloop yig filters, yig oscillators, yig tuned harmonic generators, and yig based integrated receiver frontends tuners. This option adds a microwave mixer, a second yig tuned filter, a second gaas amplifier, and associated signal switching. Based on micro lambda wireless yig tuned filter devices, the mlbf series of benchtest filter assembliescovers a frequency range from 500 mhz to 50 ghz in both bandpass andbandreject versions. The step recovery diode impulse generator is driven at a subharmonic of the desired output frequency. The tuning sensitivity for all four filters is typically 20 mhz ma, with worstcase tuning linearity of 3 mhz for the two lowerfrequency filters and 5 mhz for the two.

Yttrium iron garnet yig is a crystal that has very high q characteristics. In this circuit, the ripples have to be made to drop across the resistance r instead of the load resistance rl. Dragged it to the microwave lab at the university, and tested it on a spectrum analyzer. Edn micro lambda wireless unveils tunable yig filters for. Filter circuitsworkingseries inductor,shunt capacitor,rc. They have a standard pin configuration, which is almost always the same fig. Each switch has a time associated with both the driver. Each switch has a time associated with both the driver circuit employed and the bias. Yigbased closed loop signal filtering and amplitude control. Performance options the hp 85644a tracking source is. A nonreciprocally coupled ferrimagnetic band reject and bandpass filter having passbands from 218 ghz and 618 ghz respectively. Yig tuned filters with commercial serial drivers poweron reset the mlwi digital driver has a poweron reset circuit to set the dacs output to ovfmin in unipolar mode when vdd is first applied. Driver tunin when properly biased, the driver converts the y ig filter to a voltage tuned device where a control voltage of 0 to 10 volts tunes the filter over the specified output frequency range. As you have seen, by making the capacitance or inductance variable, the frequency at which a circuit will resonate can be controlled.

Microwave synthesizer modules yigtuned filters yig. Once the first yig tuned filter is tuned and the rf source frequency and power set, the second yig tuned filter is tuned to the correct, systems, or. The ytm from one of the more modern hp 867x sweepers very similar to the above ytm but this one has an internal amplifier to drive. Both admiral microwaves and sister company, aspen electronics, have specialists on hand to advise customers on selecting accessories, or indeed, specifying equipment for all their rf and microwave systems and component test and verification needs. Input regulators for improved stability versus power supply variations. Angt143a frequency switching speed in microwave signal generators page 2 of 7.

An apparatus and method for calibrating a yttriumirongarnet tuned filter ytf is disclosed. Edn micro lambda wireless unveils tunable yig filters. Typical circuits with op amp interfacial input and bipolarvmos current. Micro lambda wireless offers an extensive range of yig tuned filters for use with the mlbf series. Yig oscillators and filters with basic coil driver circuits to facilitate tuning of the yig component output fre quency. Phase locking a yig tuned oscillator page 1 eevblog electronics community forum. Another yig application is yig oscillators, where the sphere acts as a tunable frequencydetermining element.

A connection diagram should acquired for these types, since no rules are applicable here. Any luck purchasing yig tuned oscillators from ebay. This ensures that unwanted dac output voltages will not occur immediately following a system powerup, such as after power loss. Keane in a design note, design criteria for yig tuned bandreject filters, ferretec, inc. All drivers in this series provide input voltage regulators, and compensation circuits to improve frequency drift. Technology description yig tuned filters w hat is yig. Microwave synthesizer modules yigtuned filters yigtuned. Resonant circuits as filter circuits the principle of series or parallelresonant circuits have many applications in radio, television, communications, and the various other electronic fields throughout the navy. It was decided to make a yig resonator and an amplifier as separate circuits with rf connectors. An electromagnet then tunes the yig filter to select the desired harmonic.

Yig products this analog driver is one of raditeks family of yig products designed for raditeks rybpfi3 and rytoi3 series. Integrating a driver at micro lambdas factory ensures that peak perform. Consisting of a step recoverydiode and a yig tuned filter, the multiplier converts the amplified yto signal to useful rf power levels at twice and three times the yto frequency. The frequency range of up to 6 ghz was selected based on lab equipment available to students at sjsu.