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Engineering Reference Materials for RF Schematics
  • RF Switching

    The primary reasons for using vacuum relays in RF applications are their exceptional insulating qualities and their low RF contact resistance-as low as .03 ohms at 30 MHz. This low RF resistance remains stable throughout the service life of the relay because of the advantages provided by the vacuum

  • RF Related Conversions

    , the resistance of 50 used above reflects that RF systems are matched to 50W. Since RF systems use decibels referenced from 1 mW, the corresponding voltage increase for every 1 mW power increase can be calculated with another form of Ohm's law:. A.H. Systems - RF Related Conversions. 9710 Cozycroft Ave

  • Evaluation of RF Testing

    Transmission Line and Antenna Testing has become a common test of RF network integrity over the past few years. This relatively new testing methodology is a result of new test equipment evolutions and the need to fully understand the integrity of RF networks after installation. While common today

  • RF Probe Calibration

    Introduction: The calibration of RF Field. Probes is a complex process. Characterization is. a more correct term to use than calibration. The. probe must be properly characterized to reflect. how the end user uses his/her probe in their. measurement program. Differences as much as. +/- 6dB can

  • RF Measurement Techniques

    The RF and microwave characteristics commonly used to define the performance of components are typically measured using a vector network analyzer. Since the packages of devices manufactured by Barry Industries, Inc. typically do not have coaxial connectors, the issue of the most appropriate

  • Discrete RF Semiconductors: Alive and Well

    Commercial RF/microwave integrated circuits (RFICs) were establishing a credible toehold. at the time, to the extent that the prevailing conventional wisdom held that discrete. RF semiconductors were on a sure, quick path to obsolescence. My gut reaction told. me that my new assignment had placed

Discussions about RF Schematics
  • Re: Commercial Radio Station Being Picked Up On 447.2375 MHz

    Joshi, perhaps you can explain to us how you would tell the difference between the feed and the broadcast signal, especially since they are identical except for the carrier frequency, power level and a few microseconds of delay as the signal is amped up to broadcast levels. And let's rule out...

  • Re: Surge Arrester

    What kind of transmitter? RF, hardwired, bit rate, signal frequency. Ya think the signal edge has been affected? How? Did you use any test equipment to measure the effects. Can you show a schematic diagram of the transmitter, and receiver circuits. What type of surge arrester, silicon, RTV. What is...

  • Re: RC car circuit

    When your car turns either way, the two motors have an oposite polarity to one another. Find the transistor outputs from the RF decoder that control the motors and XORthem; use the gate output to control a PWM before the DC BUS (e.g. 1=30%, 0=100%). You'll need basic skills in electronics.

  • Re: Wireless remote level control

    How about a laser pointer aimed at a sensor (since you have a clear line of sight)? It potentially could be a lot cheaper than an RF system. If interested, I'll whip out a schematic . . .

  • Re: Sine-wave Light Dimmer

    cnpower I too have an interest in a sine wave controller which would reduce or eliminate RF harmonic interference and hash. May I also have a copy of the circuit schematic you mention? Lonnie...

  • Re: Crystal oscillator problem

    Bread boarding HF is difficult. Typically you can use blank copper clad PC board as a ground plane and then apply or glue strips or pieces of the same PCB to solder components to. We did this type of bread boarding with a lot of RF stuff. We simulate everything in LTSpice (its free from Linear Tech...

News about RF Schematics
  • NXP brings its wireless RoadLINK transceiver to Car-to-X automotive apps

    The dual radio multi band RF transceiver for Car-to-X (C2X) applications as well as traditional WiFI and will be released for automotive production in 2015

  • Isola Announces Conversion Service in the Wake of Global Shortages of RF Substrates

    CHANDLER, Ariz. — Isola Group S.à r.l., a market leader in copper-clad laminates and dielectric prepreg materials used to fabricate advanced multilayer printed circuit boards (PCBs), today announced that its technical staff would offer a conversion service for PCB fabricators of radio frequency (RF) and millimeter-wave applications. This global 24-hour design review service will enable PCB fabricators to quickly and cost-effectively transition their current RF substrates to Isola’s RF products and eliminate the production backlogs caused by the current shortages of RF substrates. The company also announced that it has increased production of its RF-related materials; Isola’s materials are in stock and ready to ship – as opposed to other laminate suppliers that have extended their lead-times to as long as 12 weeks. As part of Isola’s design review, the company’s technical staff will respond to customer requests within 24 hours of the inquiry and work to provide on a turnkey basis all of the calculations, testing, characterizations and material recommendations to assist PCB fabricators and OEMs to convert to Isola’s materials. This service will also address some of the commonly held misperceptions about the difficulties of migrating from a currently used material to an Isola material, including the cost of ownership related to material processing, the equivalency of materials available in the market, concerns about thermal conductivity and heat dissipation and PCB fabricator support and credentials. While other material suppliers’ manufacturing capacities are limited, making scale-up to full production nearly impossible, Isola’s suite of modern, extremely cost-effective substrate alternatives are best in class and have no capacity limitations. Isola has increased production of its very-low loss materials including I-Tera MT, I-Tera MT RF, TerraGreen and Astra MT in response to increased lead times by other suppliers in the RF market. Isola has substantial available manufacturing capacity at its ten manufacturing facilities around the world. Current Isola customers have realized a 50 percent lower cost of ownership due to the processing and pricing advantages of Isola’s materials versus Rogers’ 3000 and 4000 series and similar competitive products from Arlon and Taconic. Isola’s very-low loss materials are ideal for printed circuit designs that operate at wireless communication (700 MHz to 3500 MHz) and higher millimeter-wave frequencies of up to 110 GHz. Target applications include 24 GHz and 76 to 79 GHz frequencies in use for advanced driver assistance packages, such as adaptive cruise control, collision avoidance, blind spot detection, lane departure warning and stop-and-go systems. Additional applications for Isola’s RF/microwave materials include power amplifiers, base station antennas, DAS antennas, CPE antennas, feed networks, point-to-point microwave links, millimeter wave applications, GPS satellite antennas and other advanced radar applications. To inquire about the 24-hour design review service, please contact or visit For more information about the company’s RF materials, please visit[...].

  • What Rate of Amps Can I Charge Deep Cycle Battery?

    This is a schematic of an idea I've had for re-organising my emergency power supply for brown outs. The solar array will only be connected to the battery during brown out. I have a 10amp MPPT controller which I know I could wire to the 2 x 120watt panels, but I believe that would restrict the charg

  • TI''s latest RF430 security MCU has highest RF integration in the industry

    The RF430F5978 MCU from Texas Instruments is a highly integrated RF solution with improved read zone and battery performance for ultra-low power applications.

  • Dawn of Direct RF Sampling

    Whether you are working with industrial instrumentation or aerospace controls, ensuring signal acquisition in congested RF environments can be challenging. Direct sampling, however, provides a way around impediments like noise and interference. The AD9625 analog-to-digital converter (ADC) from A

Product Announcements for RF Schematics
RF Upconverter and RF Downconverter

Model Q-band Q-Band SATCOM Series of outdoor, antenna-mount block up- and downconverters and test translators designed for use in secure, high performance satellite communications requirements are now available from MITEQ. This series covers RF frequency bands as wide as 43.5 to 45.5 GHz with either a 500 MHz IF bandwidth or full 1 GHz wide L-band IF. Much higher frequency IF bands are available in custom product derived from this new MITEQ product series. As with all MITEQ SATCOM converter...

Carlisle Interconnect Technologies
RF Connectors

Carlisle Interconnect Technologies is your reliable resource for high-performance RF/microwave connectors designed for military/aerospace, instrumentation and wireless infrastructure markets. Vertical integration and extensive manufacturing capabilities ensure that quality, always the primary consideration and on-time delivery are never compromised. Carlisle IT provides in-process testing to measure characteristic impedance, capacitance, dielectric withstanding voltage and time delay mismatch...

Shimadzu Scientific Instruments, Inc.
RF-20A/RF-20Axs HPLC Fluorescence Detectors

A water Raman S/N ratio of at least 1,200 for the RF-20A and 2,000 for the RF-20Axs makes these detectors powerful tools for tests demanding analysis of trace-level components while retaining the acquisition speeds necessary for ultra-fast analysis. Because fast response is necessary to follow the sharp peaks in ultra-fast analysis, the RF-20A and RF-20Axs provide 10 ms response. The quick response time permits ultra-fast LC without loss of separation. Additionally, simultaneous testing...