The pin diode spdt rf switch and fet based rf switch use cases or examples are explained. Determine the frequency of operation and rf power handling of the switch design. At a minimum, an rf switch based on pin diodes needs a dc blocking capacitor to prevent the dc bias current from reaching the rf output, and an rf choke to provide a path for the dc bias current to return while blocking the rf signal. How and why to use pin diodes for rf switching digikey. The total bill of materials for the switch rf evaluation board and driver circuit board is the sum of the components listed in tables 7 and 8. Under zero or reversebias the off state, a pin diode has a low capacitance. Waveguide switch an component specifically designed for mechanically or electronically positioning one or more waveguide sections so as to couple it or them to other sections in a waveguide system. Most pin diode switches are of the single pole multiple throw type.
The hf power coming from the tx will see 50 ohms towards the antenna, and 0r ohms towards the pin diode at both t points r is the resistance of the pin diode. Sp4t pin diode switches from pasternack enterprises ship same day. The selections below include spst switch elements to spnt switches. A unique feature of the pin diode is its ability to control large amounts of rf power with much lower levels of dc. It is caused by energy storage in the driver andor rf circuitry. Connectorized switches, pin diode switches, gaas switches. Component value qtyboard size manufacturer mfr part number characteristics.
The following procedure outlines and effective process for pin diode selection for switch design. Rf switch ics integrated 50w pin diode spdt switch enlarge mfr. Spdt rf switch ics are available at mouser electronics. The mpd2t28125 700 driver can source current up to 200 ma to enable pin diode switches to produce low insertion loss and high isolation. Pin diode based switches can be used in higher power transmitreceive tr functions or active receiver protection applications. At these types of frequencies, a pin diode is fundamentally a device with an impedance controlled by its dc excitation. Microsemis switch drivers contain internal spiking and decoupling capacitors. Cordless and mobile phones, cellular base stationswireless infrastructure, satellite radio, gps and dab, 2. The keysight p9400c solid state pin diode transfer switch offers outstanding performance in terms of porttoport isolation, switching speed and low insertion loss over a broad operating frequency range of 100 mhz to 18 ghz. Under a forward bias of 1 ma the on state, a typical pin diode will have an rf resistance of about 1 ohm, making it a good rf conductor. These signals arise from the waveforms generated by the switch driver and, in particular, from the leading edge voltage spike required for highspeed switching of pin diodes.
Pin diode switches from pasternack are most commonly used in rf, microwave and millimeter wave test systems for routing varying signals between instruments, allowing multiple tests to be performed at the same time using the same setup. Low output resistances allow it to develop high output current spikes to ensure fast switching speeds. Find rf pin diodes information at rf microwave devices. Our pin diodes are manufactured by skyworks, isolink, nxp and p1db. In a simple spst pin diode switch figure 1, the diode can be either series or shuntconnected. Macoms cmos switch drivers are used extensively in wireless infrastructure base stations as well as aerospace and defense applications. This article demonstrates how the dh0035 may be applied to driving pin diodes and comparable loads which. This transition is the slower of the two transitions in a switching application since the driver circuit is attempting to remove stored charge from the pin diode. The information in this chapter is presented as a guide for the rf switch switch driver interface.
Api technologies offers a complete lineup of pin diode switch drivers with output current capability of 10 ma to 50 ma and switching speeds as fast as 6 ns. Rf switch pin diode coaxial switches atm microwave. Product brief rf pin diodes maximized rf performance at reduced form factor operating up to 6 ghz with highvoltage handling capabilities, infineon pin diodes come with low loss and low distortion level ensuring high quality and performance in a wide range of mobile communications and rf applications. P9400c solid state pin diode transfer switch, 100 mhz to. Please use the pin diode search below to select your product, or call us for availability and. There are some great vendors out there that can supply you with many types of pin switch drivers commercial. Pin diode drive circuits optimized for fast switching.
Consequently, the pin diode makes a good rf switch. Please view our large selection of pin diodes below. Manufacturer part number manufacturer description quantity available unit price usd. The result is that the fets are rf grounded but a positive dc voltage is injected. This driver can supply voltages from 10 v to 125 v for reverse biasing switching pin diodes to enable pin diode switches, such as those described above, to handle up to 100 w cw rf signals. A simple untuned singlepole, single throw spst switch may be designed using either a single series or shunt connected pin diode as shown in figure 5. This driver is compatible with high volume, surface mount, solder reflow manufacturing. Sp4t pin diode switches and other rf, microwave and fiber optic products from pasternack ship same day worldwide. Determine the preferred type of manufacturing for the pin diode in the switch design. Atm manufactures a selection of solid state pin diode rf switches and electromechanical switches.
Driver circuits for high power pin diode switches the information in this chapter is presented as a guide for the rf switch switch driver interface. Rf switch readings are based on power flowing through an on rf switch. Highspeed analog cmos technology is used to achieve low power consumption at moderate speeds. The pin diode finds wide usage in rf, uhf, and microwave circuits. Drivers are typically used to translate ttl control voltages for rf and. The diode chips are bonded into sealed ceramic packages that are designed for the most stringent electrical and environmental conditions. Hiller, establishing the minimum reverse bias for a pin diode in a high power switch, ieee trans.
The seriesconnected pin diode configuration can provide reasonably low insertion loss over a multioctave frequency. An alloff rf switch state can be achieved using the drivers enable pins. External negative supply voltages may be as high as 18 volts. The two quarter wave sections operate in identical fashion in tx mode. Pin diode drivers introduction the dh0035dh0035c is a ttldtl compatible, dc coupled, high speed pin diode driver. How rf switch works rf switch equivalent circuits pin diode,fet. Designers count on macom to provide the highestperforming pin diode switches. Drivers are typically used to translate ttl control voltages for rf and microwave attenuators and switches. Video leakage refers to the spurious signals present at the rf ports of the switch when it is switched without an rf signal present. Discrete semiconductor products diodes rf are in stock at digikey.
Ma4sw410 datasheet16 pages macom sp4t monolithic pin. Pin diode rf switch part number fmsw6273 from fairview microwave is one of a huge selection of coaxial switch products supplied for radio. Manufacturing, material properties, measurement and characterization. Make offer vishay 1n5819e354 2 pin diode ua 40v 1a nib of 5500pcs. Please call us with your requirements and discuss your needs for rf switches with one of our design engineers. Cmos switch drivers macom partners from rf to light. A diode alone is not a complete and useful switch as it is only the core switching element. Get the best deals on pin diodes when you shop the largest online selection at. The low capacitance will not pass much of an rf signal. Driver circuit for highpower pin diode switches introduction. It mentions how rf switch works along with its equivalent circuits. It is capable of delivering peak currents in excess of one ampere at speeds up to 10 mhz. The driver circuit that is needed for pin diodes almost precludes the use of this. Pin diode driver circuits are a pain to design and build.
References 1,2 provide a fuller treatment of this subject and can be used as a basis for rf switch switch driver interface designs. Pasternack rf pin diode switches are active microwave devices that route a high frequency rf signal through a set transmission path. References 1,2 provide a fuller treatment of this subject and can be used as a basis for rf switch. Mcli pin diode switches are offered in many multiport models up to sp8t single pole eight throw that feature high isolation, low insertion loss, and fast switching times up to 100 nanoseconds. Surface mount or chip and wire hybrid manufacturing. Find rf switching pin diodes related suppliers, manufacturers, products and specifications on globalspec a trusted source of rf switching pin diodes information. Mdts product line of pin diode switch drivers is designed for use in applications. We can, on special request, provide single pole ninethrow pin diode switch sp9t, single pole tenthrow pin diode switch sp10t, single pole eleventhrow pin diode switch sp11t, singlepole twelvethrow pin diode switch sp12t and can array switches to form switch matrices to handle signal routing in complex systems. How to specify pin diode switches american microwave. Find high power rf pin diodes related suppliers, manufacturers, products and specifications on globalspec a trusted source of high power rf pin diodes information. Some pindiode switch designs can handle power levels up to a few thousand watts of peak power, but there is a tradeoff with slower switching speed. The switch may be used in transmitreceive applications by connecting the rf common port input, pin 5 to either the output1 or output2 port pin 1 or 3, respectively using a low loss path i. We utilize low parasitic capacitance for fast switching, small size, and excellent reliability.
Infineon technologies provider of dcdc converter, transceivers, motor drivers and further products. Reflective switches reflective switches conduct rf power when the diode is reverse biased and reflect rf power when forward biased. Pasternack sp4t pin diode switches are part of over 30,000 rf, microwave and fiber optics products available for same day shipment. Delay 50 % ttl10% rf voltage is on the order of 1 us and can be. Inputs are compatible with standard logic families. Macoms madr007097000100 is a spdt driver used to interface between ttl logic signals and pin diode based microwave switches. Thin film metalization on ceramic substrates ensures low parasitic capacitance for fast switching, small size, and excellent reliability. Sp4t pin diode switches pasternack enterprises, inc. Pin diode drive circuits optimized for fast switching master of science thesis. Mcli also offers high speed switching solution through our pin diode switch line. Sierra microwave technology rf pin diode switch to 26ghz skyworks solutions inc rf switch manufacturer, fet, spst, multiport, lnbdbs switch matrix spectrum microwave, inc. Product information and data sheets are hyperlinked to the part number and recommended switch drivers or application circuits are noted. Copy your list of part numbers from any document and paste them in the text box below.
A high power solid state tr switch by gerald hiller and rick cory, skyworks solutions, inc. Because of the complexity of designing a highspeed current driver circuit, the fet switch typically has an advantage in switching speed as well. They are move indicative of the five different technologies available to the switch manufacturer as well as distinct application area of switch requirements. Narda, an l3 communications company, recently introduced the model. Infineon pin diodes come with low loss and low distortion levels and are suitable for a wide range of mobile communications and rf applications. Pin diodes are available at mouser electronics from industry leading manufacturers. The lna switch module integrates rf functional blocks such as a pindiode based high power switch capable of handling up to 52 w with an lte signal 8 db. Spst to sp8t, for frequencies from 1 mhz to 3000 mhz.
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