AMF AMPLIFIERS Table Of Contents AMF Technology Overview .

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Back toAmplifier Home PageAMF AMPLIFIERSTable Of ContentsAMF Technology OverviewSpecification DefinitionsLow-NoiseLow-Noise SATCOMMedium PowerPower AmplifiersOutline Drawings100 Davids Drive Hauppauge, NY 11788 631-436-7400 Fax: 631-436-7430 www.miteq.com

TABLE OF CONTENTSCONTENTSPAGEINTRODUCTIONCorporate OverviewAMF Technology Overview23SPECIAL AMPLIFIER DESIGNSTemperature CompensatedLow-Phase NoiseMicrowave LimitingSlopingWaveguide InputSpecification DefinitionsThermal Considerations66788913AMF AMPLIFIERSLow-Noise AmplifiersOctave BandMultioctave BandModerate BandUltra-BroadbandLow-Noise SATCOM AmplifiersS-Band Waveguide InputC-Band Waveguide InputX-Band Waveguide InputKu-Band Waveguide InputCONTENTSPAGEAMF AMPLIFIERS CONTINUEDMedium Power AmplifiersCoaxial Millimeter WaveMultioctave BandOctave BandPower AmplifiersGeneral Amplifier OptionsGeneral Specifications555658606565OUTLINE DRAWINGS66ISO 9001:200087ORDERING NThis short form catalog is intended to provide anoverview of MITEQ's AMF Amplifier Department'sstandard products and custom capabilities. The products within this catalog are organized into five majorsections: Low-Noise AmplifiersMedium Power AmplifiersPower AmplifiersSATCOM AmplifiersSpecial Amplifier DesignsThis division is based upon this department’s emphasis in the amplifier market. The low-noise and powersections are further subdivided into classifications ofbandwidth: ModerateOctaveMultioctaveUltra-BroadbandCoaxial Millimeter WaveIn addition to the detailed product information, wehave included typical test data from some of ouramplifiers to give a feel for the performance listed inthe specification tables. We have also included, foryour reference, a section filled with application noteswritten by our engineers to help in understandingsome system design parameters when using ouramplifiers. Included in this section is a note on specification definitions. You may also find these especially informative in assuring that your requirements are inline with the catalog specifications.In all, we think you will find this catalog informative anda useful tool to better understand MITEQ's AMFAmplifier Department, as well as a good general reference for any amplifier application.

CORPORATE OVERVIEWMITEQ, an acronym for (M)icrowave (I)nformation(T)ransmission (EQ)uipment, designs and manufactures acomplete line of high-performance components and subsystems for the microwave electronics community. Located onLong Island, New York for more than thirty-five years, it hasgrown into a company, which is dedicated to achieving technical excellence, producing quality products and satisfyingour customer’s specific needs. Satellite and ground-based communicationsystems Missile guidance Military electronic countermeasures, radarwarning and surveillance systems Land, sea, and airborne radar Air traffic control radar Radioastronomy Research and development effortsSTANDARD PRODUCT LINESMITEQ’s product lines are basically split between two marketsegments: Microwave components and integrated assemblies Satellite communications & earth station equipmentThe Microwave Component Division offers designs up to andover 60 GHz, including: Amplifiers: Moderate to broadband,ultralow-noise to medium-power,bipolar, and GaAs FET designs Mixers: Single-, double-, and triplebalanced, MESFET and Schottkymixers and low-noise receiverfront ends Frequency multipliers Passive power components Microwave control products:Solid-state switches, digital attenuators,limiters, and phase shifters RF and IF signal processing components Oscillators: Crystal, voltage,free-running, and phase-locked Frequency synthesizers Integrated multifunction assemblies Fiber optic productsMITEQ’s Satellite Communication and Earth StationEquipment Groups manufactures the following: Up/downconvertersTest translatorsIF/video equalizersRedundancy switchover unitsVideo modulators and modemsSpecific products include synthesized converters with 1.0kHz and 125 kHz frequency step sizes, INMARSAT L- and Cband converters, pilot generators and receivers, crystal controlled converters, video exciters, and custom designed products.CUSTOM DESIGN CAPABILITIESAlthough MITEQ offers one of the broadest lines of standardcatalog items, the bulk of MITEQ’s business is in customizedcomponents, assemblies, and systems designed specificallyaround the customer’s needs. MITEQ’s heavy emphasis oninternal R&D throughout its history has lead to the creation ofa company with the ability to adapt quickly to the changingneeds of the customer and market while at the same timeoffering competitive prices and fast turnaround times.APPLICATIONSMITEQ’s components and systems are supplied to a widevariety of military and commercial markets including:MANUFACTURING AND DESIGNCAPABILITIESMITEQ’s state-of-the-art facilities presently consist of fouradjacent buildings totaling 215,000 square feet. In additionto housing thirteen separate engineering and manufacturinggroups, MITEQ prides itself on its support groups including:drafting, which uses the latest commercial CADD and proprietary software programs; and an extensive machineshop, which includes top-of-the-line numerically-controlledOkuma, Mitsui, Seiki and Matsuura vertical machines capable of machining to the tightest of tolerances, guaranteeingrepeated accuracy and reliability. MITEQ has five Class100,000 and two Class 10,000 clean rooms in order to support our high reliability space and military projects.To accomplish the engineering, manufacturing and testingof MITEQ’s components and assemblies, MITEQ investsheavily in capital equipment. This state-of-the-art equipmentincludes a wide array of vector network analyzers and synthesized sources, phase noise test sets, custom noise figuremeasuring equipment, glass furnace equipment to controlthe process of glass sealing, thermal/humidity chambers,and PIND and shock and vibration stations for environmental screening, to name just a few.QUALITY ASSURANCEMITEQ, a recognized world class supplier with an outstanding reputation for product quality, has undergone the extensive ISO-9001:2000 certification process to help secure itsfuture as a primary source for advanced microwave products.SPACE HERITAGEMITEQ’s continued advancements in this state-of-the-artand unique capability have led to wide acceptance by themicrowave community as a forerunner in spaceborne technology. Our space-qualified components include mixers,oscillators, amplifiers, synthesizers, and super-components.MITEQ’s Space-Qualified Quality Assurance Plan establishes the actions necessary to provide confidence that the enditem will meet the quality, reliability, and electrical performance required for space-qualified applications. Recentspace platforms include: AMSU-B SSMIS GEOSAT SEAWINDS TERRASARX SEASAT SPINSAT TOPEX HERSCHEL EOS-MILS SAR-LUPECUSTOMER SERVICEMITEQ continually evaluates its service procedures toensure that a close relationship is maintained between thecompany and its customers. The goal in every case is todeliver products of exceptional quality, backed by responsive technical and administrative support. MITEQ remainscommitted to offering comprehensive technical support to itscustomers through a direct customer-to-MITEQ engineeringlink. This enables a quick response to the customer’s needs,and ensures receipt of exactly what the customer requires;delivery of cost-effective solutions for the most demandingapplications.2

AMF TECHNOLOGY OVERVIEWCIRCUIT DESCRIPTIONSMITEQ's AMF amplifiers incorporate many designtechniques commonly used throughout the industry.Through extensive study and years of experience,our engineers have become more proficient in certain subtleties of amplifier design, most notably in thearea of noise and power match optimization.Although noise figure is clearly a mark of excellencefor MITEQ, an advantage that cannot be overlookedis our flexibility to utilize and combine all techniquesto meet the customer's specific requirements. Eachsystem requirement has an optimum approach, andMITEQ uses all of the available design options plusa few "tricks of the trade" to offer the best performance.as clear. The cost and size are adversely affectedbecause of the two FETs per stage. In addition, ifused as the input stage of an amplifier, the loss of the90 hybrid will degrade the minimum achievablenoise figure. Finally, this design is bandwidth limiteddue to the problems in realizing multioctave 90 hybrids. AMF series amplifiers that utilize the balanced approach are designated by our "B" series, forexample; AMF-2B, AMF-3B, AMF-4B, etc., representing 2-, 3- and 4-stage balanced amplifierdesigns.SHUNTFEEDBACK50 ΩSERIESFEEDBACKRFINFEEDBACK AMPLIFIER STAGERFOUT50 ΩBALANCED AMPLIFIER STAGEBALANCED AMPLIFIERSDuring the early years at MITEQ, the balancedamplifier approach was most widely used. Eachamplifier stage in a balanced design employs a 90 hybrid at the input and output to feed two discretetransistors. The advantage of using this topology is: Good VSWR characteristicsEasily cascadable stagesEasy power matchingImproved output power performanceThe disadvantages of this type of design are equallyBALANCED AMPLIFIER3FEEDBACK DESIGNSMITEQ has established a technique to counter thedeficiencies of the balanced approach and developed an amplifier series based upon a feedbackdesign approach. Our "F" series AMF amplifiers usethis approach when its advantages fit the specificapplications.Feedback based designs use a single transistor ineach stage. The impedance of the FET is matched tothe input or output source and load impedance bymeans of feedback. Two basic types of feedback areapplied, series or parallel. Series feedback is alsoknown as "lossless" feedback because there is noadditional lossy circuits added to the input of the FET.Although difficult to optimize, a lossless feedbackdesign provides the lowest noise figures availabletoday.FEEDBACK AMPLIFIER

AMF TECHNOLOGY OVERVIEW (CONT.)When implementing this design, the engineer mustpay particular attention to impedance matching theinput stages. The interaction of power and noisematch of the transistor must be optimized over thespecified band. This optimization of a feedbackamplifier design involves a tradeoff exercise betweeninput VSWR and noise figure performance. Thematching techniques utilized are best accomplishedin "chip and wire" construction where subtle tuningcan be realized. This is an area that requires extensive experience and a detailed knowledge of thetransistor and impedance matching circuits in orderto achieve the best possible performance.MITEQ is not the only company using a feedbackapproach to achieve low noise figures; however,many of our competitors must utilize input and interstage isolators to allow them to provide good VSWRperformance in the presence of the best noisematch. Although isolators are sometimes used forspecial applications, MITEQ has been able toachieve both a good power match and an optimumnoise match without isolators. This gives us a greatadvantage over our competition by providing the lowest noise figures available.DISTRIBUTED AMPLIFIERdistributed amplifier design approach and achieve multioctave to ultra-broadband designs in excess of 40 GHz.OUTTEST AND ALIGNMENTSATCOM AMPLIFIERSINDISTRIBUTED AMPLIFIER STAGEMITEQ's SATCOM amplifiers are offered with andwithout the use of input isolators. In both cases,feedback is the technique used in the input stage tofacilitate impedance matching for an optimum balance of power (VSWR) and noise figure.CUSTOM ENGINEERINGDISTRIBUTED AMPLIFIERSAlthough the feedback approach has no implicitbandwidth limitations, MITEQ's AMF Department utilizes a distributed amplifier approach to supportbroadband and ultra-broadband applications.This technique uses multiple FETs per stage in a“traveling wave” approach to provide each stage witha balanced combination of gain flatness and power.The textbook design of a distributed amplifier uses50 ohm termination resistors in each stage, whichhave a negative effect on noise figure. MITEQ'sengineers have developed proprietary techniques toimplement this approach and still achieve low noiseperformance. Our "D" series amplifiers utilize theAll these circuit approaches are combined to providean endless array of amplifier designs. The positiveand negative features of each design are weighedand combined to meet each customer’s specificrequirements. In addition to these approaches,MITEQ's AMF Amplifier Department integrates otherfeatures to meet custom design requirements, including: Gain controlInput limiter protectionSloping amplifiersLimiting amplifiersVarious bias options4

AMF TECHNOLOGY OVERVIEW (CONT.)These various design possibilities are best discusseddirectly with our engineers. MITEQ's engineering personnel not only possess the detailed amplifier knowledge, but also haveextensive overall systems background to help customers translate their true requirements into specifications. This direct contact on an“engineer-to-engineer” basis has allowed MITEQ to better support our customer base with information andsuggestions to improve the use of our amplifiers in theirsystems.CONSTRUCTIONin the overall chassis to ensure compliance to thesespecifications.The distributed amplifiers and the feedback designsuse a technique where the FETs are mounted directly to the chassis. This technique allows MITEQ toachieve a physically smaller mechanical interfacebetween the input stage and the coaxial transition,making lower noise figures possible. Also, thetighter interstage tolerances assist in achievingbroader bandwidths, as required by both of theseseries.MITEQ's AMF amplifiers are manufactured with ourinternal thin film hybrid manufacturing process. Thistype of Microwave Integrated Circuit (MIC) construction was introduced to MITEQ during the early 1970sand has been the main manufacturing technique forour amplifiers ever since. Our expertise in this formof microminiature integration has allowed MITEQ toachieve truly state-of-the-art performance, particularly in the areas of low-noise figure and broadbandamplifier design.Most balanced amplifiers made by the AMFDepartment are constructed using a carrier technique. Each amplifier stage is individually manufactured and tuned on a stand-alone carrier assembly.These carriers are then cascaded in the final chassisto achieve the total specified parameters of theamplifier. Final alignment and test is performed with-CLASS 100,000 CLEAN ROOM5MACHINE SHOPTo accomplish the manufacturing and testing of ourcutting edge amplifiers, equally state-of-the-artequipment must be utilized. This includes purchasesof CNC machining equipment to manufacture tighttolerance kovar chassis for our millimeter-waveamplifiers, glass furnace equipment to control theprocess of glass sealing, 100 GHz network analyzers to test our millimeter-wave amplifiers,thermal/humidity chambers, PIND, shock, and vibration stations for environmental screening.In addition to special equipment, MITEQ maintains alarge inventory of standard equipment for microwaveintegrated circuit assembly, including; thermocompression wirebonders, eutectic substrate attach flowovens, wire pull testing equipment, etc. All-in-all,MITEQ's capitalization has allowed us to confidentlyapproach any amplifier requirement.

TEMPERATURE COMPENSATED AMPLIFIERS Moderate to broadband to50 GHz Gain windows from as lowas 1 dB over -54 to 85 CAPPLICATIONS: Military systems Stringent environmentalindustrial applications High performance commercialapplicationsFor applications where normal amplifier gain variationsas a function of temperature range exceed the allowable specification limits, MITEQ offers temperaturecompensated amplifier designs whose gain variationshave been reduced with respect to uncompensateddesigns. Since gain variations over temperature arenot constant over the entire frequency range, MITEQhas adopted a gain window specification. Please reference the Specification Definitions section for adetailed description of this specification.increase in ambient temperature. The attenuator isplaced between the gain stages of the amplifier so thatnoise figure and output power performance are minimally degraded. In another approach, the FET itself iscompensated. In regions of low bias current, the FETgain is proportional to the current. The FET bias current is automatically increased by means of a thermistor at high temperatures to increase the gain, in orderto compensate for a decrease in gain as a result of theincrease in ambient temperature. MITEQ utilizes anyor all of these methods depending on the specific application or requirement.Shown here is typical compensated amplifier performance over temperature. Please contact the factorywith your individual requirements.TEMPERATURE COMPENSATEDAMF MEDIUM POWER AMPLIFIER2523GAIN (dB)FEATURES:Some typical techniques used for compensating forgain variations are as folllows: Integrating a PIN diodeattenuator and FET bias current compensation. In thisapproach, the control current of a PIN diode attenuatoris automatically decreased by means of a thermistor sothat at high temperatures there is less attenuation.This compensates for the decreased gain due to an2119Room ( 25 C)Hot ( 85 C)Cold (-54 C)171568101214FREQUENCY (GHz)1618LOW-PHASE NOISE AMPLIFIERS Low residual AM/PM noisefrom -150 dBc/Hz at 10 kHz Guaranteed performance Supporting test dataAPPLICATIONS: Coherent FMCW radars Low PM noise measurementsystemsManufacturers of coherent radar systems require lowphase noise amplifiers for their receiver and excitersystems. The phase noise of the amplifier is not correlated with the low noise figure, i.e. the lowest noisefigure amplifier does not always have the lowest phasenoise. In order to provide the lowest phase noiseamplifiers, MITEQ has measured phase noise for distributed, single-ended, and balanced amplifiers todetermine the optimum design. We have also measured the amplifiers with ion-implanted FETs and epitaxial FETs to determine the optimum devices.Phase noise has been further reduced 4 to 5 dB bycombining four (4) phase-matched amplifiers in parallel with input and output 4-way power dividers/combiners. The signal remains coherent while the phasenoise is random in each amplifier, resulting in a netreduction in the additive phase noise of the overall unit.Typically low phase noise designs achieve -140dBc/Hz at 1 kHz offset from the carrier, and -150dBc/Hz at 10 kHz offset from the carrier. This is 10 –15 dBlower than nonoptimized models. Please contact factory with your specific requirements.RESIDUAL PHASE NOISE (F) -160-170-180101001K10K100KFREQUENCY (Hz)1M10M6

MICROWAVE LIMITING AMPLIFIERS Tightly controlled outputpower over:- Input power range- Temperature- FrequencyAPPLICATIONS: Local oscillator driver networks Microwave phase/frequencydiscriminatorsAlthough the majority of applications utilize the amplifiers operating within their linear range, there arerequirements when an amplifier is required to operatein the saturated mode. The use of a microwave limiting amplifier is ideal for applications which requiretightly controlled output power delivered over a widerange of input powers, or over a wide frequency rangeor even a wide temperature range. Typical applicationsare in a local oscillator chain, where a mixer needs tosee a tightly controlled LO power drive for optimumperformance.PLEASE NOTE:When you require this type of amplifier, it is importantto specify that the amplifier is being used as a limitingamplifier, not as a linear amplifier. Do not specify thelinear gain and compression or saturation point. Thebest method of specifying a limiting amplifier is todefine the following parameters:1. Input power range2. Desired output range7All other specifications will ne

senting 2-, 3- and 4-stage balanced amplifier designs. FEEDBACK DESIGNS MITEQ has established a technique to counter the deficiencies of the balanced approach and devel-oped an amplifier series based upon a feedback design approach. Our "F" series AMF amplifiers use this approach when its advantages fit the specific applications.

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