Design and fabrication of 12 ghz microstrip directional coupler for. Moreover, the coupled port is dc isolated from the through line. A waveguide 10 db directional coupler operating from 325 ghz to 400 ghz is designed based on the shortslot riblettype coupling configuration and fabricated using the deep reactive ion etching drie silicon micromachining technique. A dual directional coupler figure 2 is essentially two single directional couplers connected backtoback sharing a common mainline and providing two output ports with high isolation. Minicircuits is a global leader in the design and manufacturing of rf, if, and microwave components from dc to 86ghz. The proposed design uses single section coupled line method that simulated using simulation software ads 2011. The p1db p1cpsaf0208g10w 10 directional sma coupler has a 10 db coupled port and operates from 2 ghz to 8 ghz. Sigatek directional couplers are in stock and ship the same day. Yun, a design of wideband 3db coupler with nsection microstrip tandem structure, ieee microwave and wireless components letters, vol. Ghz is designed based on the shortslot riblettype coupling configuration and fabricated using the deep reactive ion etching drie silicon micromachining technique. Model dc4255 dual directional coupler 10,000 watts cw 10khz250mhz ar rfmicrowave instrumentations model dc4255 is a high power, ultrabroadband coupler with excellent performance characteristics over a range of 4 decades.
How to specify the best directional coupler for your. Programs for dos and windows are available with source code. Since the coupler is a lossless passive element, the sum of the signals power. The skin depth and the conductivity of the gold film with the roughness of 0. Directional couplers werlatone rf directional couplers include dual, bi, and unidirectional designs with coupling factors from 6 to 70 db coupling. Broadband rf directional couplers are a common component in radiated immunity test systems. Sigatek microwave directional couplers use both lumped element and stripline techniques. How do we build couplers with less coupling, say 10db, 20db, or 30 db. Assuming that the rf source is connected at the input port and the load is connected at the output port, this dual directional coupler outputs a signal at the forward port which is 20 db lower than the power entering at the input port. The mainline insertion loss depends upon the signal level at the coupled port, as determined by design. Microwave power dividers and couplers tutorial overview and definition of terms power dividers and couplers are straightforward passive components. Directional couplers, practical tutorials, detectors, and.
Directional couplers werlatone rf directional couplers. Kirilmaz, novel broadband 3db directional coupler design method, wseas trans. Directional, bidirectional, dualdirectional and rf taps. All directional couplers have, at a minimum, an input, output, and coupling port. Directional coupler design for part number mc0218 10 from fairview microwave is rated for a 2 ghz minimum frequency and a 18 ghz maximum frequency. Design, simulation and development of wideband directional. Directional couplers are used to isolate, separate, and combine signals in measurement applications. The directional coupler can handle 10 watts of average power with a directivity of 20 db. For example, near the bottom of this page, the microstrip coupled line coupler on gaas is a 10 db coupler that does not have a similar return loss and insertion loss. Directional couplers, practical tutorials, detectors, and filters. Atlanta rf software continues to expand our product family of rfmicrowave computeraided engineering cae design software for popular directional couplers, with special emphasis on electrical synthesis, dimensional synthesis and frequency analysis.
Crucially, a directional coupler will ideally sample power in only one direction, discriminating between forward and backward traveling signals. When the power travels from port 1 to port 2, some portion of it gets coupled to port 4 but not. It is the attention to design detail, execution of the design, and quality of the fabrication which leads to a high performance component. Jul 06, 2015 for 25 turns, the directional coupler s coupling factor will be 28 db. Directional 10 db sma coupler from 2 ghz to 8 ghz rated to.
Sangwon yun, a design of wideband 3 db coupler with nsection microstrip tandem structure, ieee microwave and wireless components letters, vol. Power dividers also power splitters and, when used in reverse, power combiners and directional couplers are passive devices used mostly in the field of radio. Different couplers from 10 kw over 20 kw, 30 kw, 40 kw, 50 kw up to 100 kw built by us are used in hundreds of plasma applications at 3. Rfs cdse series directional coupler has been designed for outdoor applications covering 698 to 2700mhz. A directional coupler has four ports, where one is regarded as the input, one is regarded as the through port where most of the incident signal exits, one is regarded as the coupled port where a fixed fraction of the input signal appears, usually expressed in db, and one is regarded as the isolated port, which is usually terminated. A coupler allows the user to sample the power on a transmission line with a given coupling factor. In this paper, the design of three section microstrip directional coupler is presented.
Transformerbased, ltcc, striplinemicrostrip, bridge, and mmic designs. Write a matlab program that plots the performance of a resistor. Directional 10 db sma coupler from 1 ghz to 2 ghz rated to 50. Rf and microwave directional couplers in stock, same day shipping, microwave directional couplers 6 db,10 db, 20 db 30 db. Welcome at ihh, the specialist for development and fabrication of customerspecified directional couplers of probably unreached accuracy.
This rf directional coupler has been optimized for operation from 500mhz to 6ghz and features a low insertion loss of 0. Vice versa it outputs a signal at the reflected port which is 20 db lower than the power entering at the output port. The frequency range allows use with antennas and leaky cable systems and in. Synthesize and analyze these popular directional couplers with confidence using ars couplers, before you build them. One of the most commonly used directional coupler is adc800m2500m 10 01. In the plot below we disabled the swpvar, just to see what a perfect 10 db coupler looks like. We have the reference impedance z l 50 and the coupling coe cient cin db. Our directional coupler design uses sma ports that are female gender and 50 ohm impedance. The directional coupler design for adc500m6000m2001 is based on high quality and low loss microstrip directional coupler design. Directional coupler design for part number mc2047 10 from fairview microwave is rated for a 2 ghz minimum frequency and a 8 ghz maximum frequency. Also available are attenuators, terminations, bias tees, dc blocks and adapters.
Directional couplers werlatone rf directional couplers include dual, bi, and uni directional designs with coupling factors from 6 to 70 db coupling. Directional couplers 3, 6,10, 20, 30 db up to 60 ghz. The selectivity with which the coupler can select between forward and reverse waves is called the. The input screen is shown below for the design of a 10 db directional coupler. Product index rfif and rfid rf directional coupler. The keysight 87301c coaxial directional coupler, 10 to 50 ghz, is designed for signal monitoring and is supplied with 2. Directional couplers are fourport circuits where one port is isolated from the input port. Fairview sma directional coupler 10 db coupled port from 2 ghz to 8 ghz rated to 50 watts is instock and will ship the same day. Submillimeterwave 10 db directional coupler based on.
In many designs, amplitude flatness can be traded for bandwidth. Directional, bi directional, dual directional and rf taps. Good agreements are observed between the measured and simulated data. Our directional coupler is designed with a 10 db coupling value and a directional db coupler directivity. Sma directional coupler 10 db coupled port from 2 ghz to 8. Microwave engineering directional couplers tutorialspoint. Click here to go to our page on hybrid 3db couplers. Units couple off a defined fraction of signal from 6 to 30 db with minimal reflections or loss. Design and development of coaxial line based 1040 db variable loop type dual directional coupler for the frequency range of 50500 mhz for 2 kw power handling capability has been presented in. The pasternack directional coupler design is rated for a minimum frequency of 1,000 mhz and a maximum frequency of 2 ghz. The forward travelling wave goes into port 1 and exit from port 2.
This paper presents the design of microstrip directional coupler. One of a series of available directional couplers for applications from 0. A sample 10 db directional coupler is fabricated to verify the circuit design. Directional coupler is used to couple the microwave power which may be unidirectional or bidirectional. Design and simulation of coupledline couplers international.
The accuracy is due to dimensional tolerances that can be held for the spacing of the two coupled lines. This also explains why the return loss and isolation are only identical for 3 db quad couplers. Hybrid coupler 2 s 21 and s 31 magnitude db 115 figure a. Meca expanded offering of 5g millimeterwave products. For 25 turns, the directional couplers coupling factor will be 28 db. Receivers, reliability, smith chart, software, splitters, switches, system design, technical writing and presentations. For 20 db transformer 3 pieces of 10mm out dia due to higher power handling and for 30db one piece of 43006301 core. Directional couplers 3, 6,10, 20, 30 db up to 60 ghz sma. The pasternack directional 10 db sma coupler from 2 ghz to 8 \ ghz rated to 50 watts is part of over 35,000 rf and microwave items with 99% availability. For a 20 dbthree sections edge coupled line directional coupler, constructed as a stripline with ground plane, spacing of b3. It offers excellent directivity, return loss and flat coupling response. A dual directional coupler figure 2 is essentially two single directional couplers connected backtoback sharing a common mainline and providing two output ports with high isolation between those. Wideband directional coupler design using the substrate. Directional 10 db sma coupler from 1 ghz to 2 ghz rated to.
Awg produces 10db directional coupler from as low as 200mhz up to 26. It provides minimum directivity of 10 db with maximum mainline vswr of 1. Seems like coupling between the lines is a bit too weak. How to specify the best directional coupler for your critical. Atlanta rf software offers the following cae software for synthesis and. By placing a directional coupler between your rf amplifier and antennaprobe you can use an rf power sesnor to monitor the amount of power throughput and verify the measurements from your current monitorsensing probe and spectrum analyzer are accurate.
Signal power reflection is prevented because the coupling ports signals are isolated from the line output port. Design of a lowcost microstrip directional coupler with high. The p1db p1cpsaf0208g10w10 directional sma coupler has a 10 db coupled port and operates from 2 ghz to 8 ghz. Anaren avx corporation cinch connectivity solutions midwest microwave hirose electric co ltd johanson technology inc. This is a bit way o for which we tried to design it for. This dual directional coupler is a convenient means of. Rf couplers directional, bidirectional, dualdirectional. Sma directional coupler 10 db 2 ghz to 18 ghz rated to 50 watts. Directional couplers are specified in terms of the coupling accuracy at the frequency band center. Directional coupler design for part number mc204710 from fairview microwave is rated for a 2 ghz minimum frequency and a 8 ghz maximum frequency. We didnt bother plotting s 11 or s 21, in this perfect coupler they are zero. Toroidal cores from 43 material was used for transformers. The properties of an ideal directional coupler are as follows.
Design of a lowcost microstrip directional coupler with. Directional coupler is used to couple the microwave power which may be unidirectional or bi directional. The accuracy is due to d imensional tolerances that can be held for the spacing of the two coupled lines. One of the most commonly used directional coupler is adc800m2500m1001. The sidscl also inherits all the advantages of the sicl which include better phase linearity, low profile, lowfrequency dispersion, zero cutoff frequency, and wider bandwidth. Rf directional coupler quick bleach assuming that the rf source is connected at the input port and the load is connected at the output port, this dual directional coupler outputs a signal at the forward port which is 20 db lower than the power entering at the input port. Featuring 10 db couplers covering 18 to 40 ghz with 2. As an example, model 110067006 is an extremely broadband coupler with 6db coupling maintained within 2. The scc1015143 is an octave band 10 db dual directional coupler, covering 7. Design, simulation and development of wideband directional coupler at s band.
On the other hand, the strongest coupling factor of a standard coupler realization is. The most popular configuration of a directional coupler is the standard coupledline directional coupler sc 2. We hope you enjoy your new mw101 pocket knife keychain. Theoretical background figure 1 schematic diagram of directional coupler 9. Sma directional coupler 10 db coupled port from 2 ghz to 8 ghz rated to 50 watts is part of over 1 million rf, microwave and millimeter wave products that is instock and will ship sameday shipment from fairview. Directional 10 db sma coupler from 2 ghz to 8 ghz rated to 50 watts pe2cp00410 from pasternack enterprises is available for same day shipment from our irvine, ca location in the united states. Since, the objective is to design the directional coupler. Knowles dielectric labs l3 nardamiteq macom technology solutions murata electronics panasonic electronic components. Pdf design and simulation of ultrawideband 3 db hybrid. For a 20 db single section edge coupled line directional coupler, con structed as a. Therefore, for continuous operation at a power level of 200 watts 53 dbm, 25 dbm of power 0.
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