Tiny SDLVAs Tackle 20-GHz Bandwidth TINY SDLVAS TACKLE BANDW

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Tiny SDLVAs Tackle 20-GHz Bandwidth TINY SDLVAS TACKLE BANDW

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Tiny SDLVAs Tackle
20-GHz Bandwidth
TINY SDLVAS TACKLE BANDWIDTH!
Wideband SDLVAs, 0.01
FEATURED ARTICLE
Tiny SDLVAs Tackle
20-GHz Bandwidth
These
high-performance
successive-
detection log-video amplifi (SDLVAs) offer outstanding wide frequency ranges dynamic ranges with power consumption compact housings.
ilitary system designers often faced with processing input signals over wide dynamic range. With many systems, such direct-finding (DF) receivers, electronic-intelligence (ELINT) receivers, electronic-countermeasures (ECM) systems, radar warning receivers (RWRs), commercial instrumentation, often necessary capture analyze narrow pulses with large variations amplitude. Traditionally, successive detection video amplifier (SDLVA) component choice this task.
Today, when system designers need high-performance SDLVA, they have more choices with outstanding performance over wide frequency range 20.0 GHz. SDLVA models HMC613LC4B HMC-C052 from Hittite Microwave Corp. (Chelmsford, supplied compact ceramic package miniature hermetic module. Respectively, both offer signal-processing capability needed capture analyze narrow, high-speed pulses over wide dynamic ranges. small size power requirements these SDLVA solutions allows designers incorporate this function into systems once limited alternative signalprocessing approaches, such portable systems. HMC613LC4B SDLVA operates over frequency range provides logging range consumes only current from single +3.3V supply when processing signals input power. Ideal ELINT applications, HMC613LC4B capable processing pulses 20.0 frequency band with amplitudes from with only rise times recovery time. HMC613LC4B employs successive compression topology which delivers extremely high dynamic range conversion accuracy over wide input frequency range (Fig. input power increased, successive amplifier stages move into saturation creating accurate approximation logarithmic function. output series detectors summed into single video amplifier purpose providing single detected output. When HMC613LC4B used detection mode, VIDEO connected Video resistor, providing nominal logarithmic slope mV/dB typical intercept -119 GHz. output gain stage HMC613LC4B modified connecting appropriate
Figure Model HMC613LC4B surfacemount SDLVA (shown mounted PCB) that operates from GHz.
Figure Model HMC-C052 miniature connectorized SDLVA module that operates from GHz.
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TINY SDLVAS TACKLE BANDWIDTH!
Wideband SDLVAs, 0.01
miniature HMC-C052 module represents space savings more than percent compared with existing typical broadband connectorized SDLVA modules with similar performance (Fig. connectorized HMC-C052 module immediately replace existing broadband SDLVA modules, resulting lower-cost,
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Figure This block diagram shows various functions HMC613LC4B SDLVA.
external resistors between VIDEO VIDEO pin, also between VIDEO ground. HMC613LC4B also provides (enable) pin, which connected (+3.3 VDC) during normal operation. enable connected ground, SDLVA disabled, total supply current reduced less than This useful feature controlling total system power, particularly high-speed channelized receiver designs, where multiple channels/SDLVAs deployed. Figures show typical logarithmic error video output voltage performance HMC613LC4B over +85°C operating temperature range GHz. typical flatness over 2-to-20-GHz band from shown Fig. Measurements HMC613LC4B typically reveal better than flatness -30-dBm input-power level. maximum temperature-related deviation given frequency power level over full operating temperature range. HMC-C052 integrates HMC613 bare die, linear regulator off-chip components within hermetically sealed package that used connectorized module (2.92 connectors) dropin design. HMC-C052 operates from draws only current from single supply. (The table compares specifications HMC613LC4B HMC-C052 SDLVAs.) HMC-C052 operates from +85°C housed miniature 22.6 21.6 5.84 package.
Figure This plot shows video output error input power HMC613LC4B SDLVA.
Figure This plot shows video output error input power HMC613LC4B SDLVA.
Figure This plot shows gain error flatness input power from HMC613LC4B SDLVA.
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Figure traditional, hybrid-based SDLVA (top) requiring both positive negative power supplies shown with HMC-C052 SDLVA module HMC613LC4B SDLVA.
reduced-power-dissipation (heat) solution occupying significantly smaller form factor. Hittite Microwave's design philosophy involves careful selection best semiconductor processes design techniques available each component solution ensuring delivery market-leading product performance. This performance improvement allows systems designer maximize true potential design ultimately deliver superior product. block diagram (Fig. shows system design optimized careful section Hittite Microwave catalog components. this application example,
combines signal filtering, amplification, detection, frequency measurement into multifunction unit. such design, system engineer often seeking reduce power consumption along with overall size weight module. reduction power consumption weight renders double benefit, particularly airborne unmanned-aerial-vehicle (UAV) applications, smaller, lighter power supply required. HMC613LC4B HMC-C052 SDLVAs components required implement function, compared with traditional SDLVA solutions, provide significant savings both power consumption size equivalent performance.
Table: Comparing HMC613LC4B HMC-C052. Parameter Input frequency range Logging range Logarithmic range Logarithmic slope Frequency flatness input power Logarithmic error over temperature Rise/fall time Recovery time Output voltage Bias supply dB)1 HMC613LC4B 20.0 mV/dB 4/18 HMC-C052 20.0 mV/dB
+3.3
Note Based linear regression error curve from input power input power dBm. Note Rise/fall times measured from power dBm. Note Rise/fall times measured from power dBm.
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Figure This block diagram typical front highlights high-reliability connectorized modules red) from Hittite Microwave Corp
HMC613LC4B HMC-C052 SDLVA combined with number additional high-performance catalog components from Hittite Microwave implement capable measuring signals from GHz. simplified block diagram Fig. shows amplitude measurement channels which allow direction finding comparing signal amplitude adjacent antennas. amplitude channels selected HMC547LP3E single-pole, double-throw (SPDT) switch feeds RWR's (IFM) circuit, thus performing frequency measurement antenna pair. HMC613LC4B SDLVAs provide logarithmic video voltage signals which usually digitized with series comparator circuits, prior further processing. meet military/ high-reliability ruggedized system requirements, function implemented with hermetically sealed, connectorized modules (labeled red) which available stock items. SDLVA models HMC613LC4B HMC-C052 combine wide input bandwidths, wide dynamic range, fast rise/fall times with extremely compact packaging system-level designers seeking alternatives traditional microwave-integrated-circuits (MIC) hybrid discrete-based SDLVAs. HMC613LC4B HMC-C052 facilitate accurate logarithmic power measurement signals 0.1-to-20-GHz 1-to-20-GHz frequency ranges, respectively, commercial, military, space applications, especially where power constraining factor. These SDLVAs also ideal myriad applications
including RWRs, receivers, receivers, systems, phased-array antennas, radar altimeters, digital frequency discriminator circuits, test measurement equipment. addition these SDLVA products, Hittite Microwave continues expand product portfolio designers choose from more than standard products spanning frequency range from GHz. portfolio includes product lines: amplifiers, attenuators, data converters, frequency dividers detectors, frequency multipliers, high-speed logic, interface ICs, modulators demodulators, mixers converters, oscillators, passive devices, phase shifters, phaselocked loops (PLLs), power detectors, sensors, switches, frequency synthesizers, variable-gain amplifiers (VGAs). Data sheets detailed product information Hittite products available on-line Hittite Microwave Corp. website www.hittite.com.
Hittite Microwave Corporation Alpha Road Chelmsford, 01824 Phone: (978) 250-3343 Fax: (978) 250-3373 sales@hittite.com www.hittite.com
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Tiny SDLVAs Tackle 20-GHz Bandwidth TINY SDLVAS TACKLE BANDW

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