Transmission LIne
See Also: Transmission Line Pulse
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Transmission Line Probes
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Transmission line probes are a special type of passive probe designed for use at very high frequencies. They replace the high impedance probe cable found in a traditional passive probe with a precision transmission line, with a characteristic impedance that matches the oscilloscope input (50 Ohm). This greatly reduces the input capacitance to a fraction of a picofarad, minimizing the loading of high frequency signals. A matching network at the tip increases the DC input resistance. While they have lower DC input resistance than a traditional passive probe (usually 500 Ohm) to 1kOhm), the input impedance of these probes remains nearly constant over their entire frequency range. A traditional /10 passive probe will have a 10 MOhm) input impedance at DC, however this impedance drops rapidly with frequency, passing below the input impedance of a transmission line probe at less than 100 MHz.
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Transmission Line Pulse Testing
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Transmission Line Pulse testing, or TLP testing, is a method for semiconductor characterization of Electrostatic Discharge (ESD) protection structures. In the Transmission Line Pulse test, high current pulses are applied to the pin under test (PUT) at successively higher levels through a coaxial cable of specified length. The applied pulses are of a current amplitude and duration representative of the Human Body Model (HBM) event (or a Charged Device Model – CDM – event in the case of Very Fast TLP, or VF-TLP).
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Transmission Line Testers
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GAOTek provides affordable, safe and reliable transmission line testers, digital clamp meters and power meters for sale to the United States, Canada and Globally. A transmission line is a specialized cable designed to conduct alternative current of radio frequency. Transmission lines are used for connecting radio transmitters and receivers with their antenna to distribute signals.
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Transmission Line/Cable Testing
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HAOMAI Electric Test Equipment Co., Ltd.
Transmission Line/Cable Testing products by Haomai
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PCB Transmission Line Field Solver
Si9000e
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With its fast, accurate, frequency-dependent transmission line modelling, the new Si9000e is designed to model transmission line loss, impedance at given frequencies and extract full transmission line parameters over a wide range of popular PCB transmission lines (over 90 structures).
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Thyristor Surge Suppressor (TSS)
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When protecting parallel (double) circuit transmission lines, devices have two main functions in transient mode: clipping the voltage and drifting the current due to overload.
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Panel Mount Wattmeters
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The Coaxial Dynamics series of Panel Mount Wattmeters are designed to measure RF power in 50-Ohm coaxial cable and transmission lines, and accept plug-in elements in the range of 100 mW to 10 kW full scale, and from 0.45 to 2300 MHz
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RF Hybrid Couplers
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Pasternack RF hybrid coupler series is passive devices that couple part of the transmission power in a transmission line. Our RF hybrid coupler components provide the bandwidth, high directivity and high power that designers need for their most demanding applications. 90 degree hybrid couplers often use two transmission lines set close together so that energy passing through one is coupled to the other. Many Pasternack 90 degree hybrid coupler items are RoHS and REACH compliant. Our RF hybrid coupler series is available with SMA connectors and 3dB coupling values. Power ratings for the 90 degree hybrid coupler product line range from 20 Watts to 50 Watts. 90 degree hybrids have a frequency range that is from 1 GHz to 18 GHz. As with the other over 40,000 RF, microwave and millimeter wave components from Pasternack, this RF hybrid coupler series is in-stock. Not just in stock, but these RF couplers in a hybrid design will also ship the same day as they are purchased.
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Crypto Devices
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Confidential communications are essential to armed forces and government authorities. The Rohde & Schwarz crypto devices provide secure end-to-end encryption for the secure transmission of sensitive information over public communications networks or radio transmissions. Rohde & Schwarz crypto devices are interoperable with HF/VHF/UHF radios, satellite communications and line transmission equipment. They can encrypt and decrypt voice and data communications at the highest security levels. The crypto devices are ideal for stationary and mobile platforms in rugged terrain and in naval and airborne environments.
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Motor Termination Units
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Since the rise time of IGBTs are in the range of a few tens of nanoseconds (between 50ns-200ns), even short cables between PWM motor drives and motors cause voltage doubling at the motor terminals due to Travelling Wave Phenomenon as in transmission lines. The insulation of motor windings are prone to failure due to high voltage spikes if necessary precautions are not sufficiently taken. RC Type Output Filter Modules reduce these high voltage spikes to protect motors by connecting to stator terminals.
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Product
Power Detectors
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Macom Technology Solutions Holdings Inc.
MACOM’s power detectors are broadband devices that have integrated low loss directional couplers and built-in temperature compensation circuits. These detectors provide an easy way to monitor the power of a signal travelling in a specific direction along a transmission line. These detectors are conveniently housed in miniature lead free plastic surface mount package. Typical applications include; Power monitoring and leveling in Point-to-Point radios, IMS, Radar, VSAT, EW, Aerospace and Defense Systems.
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Product
Coaxial Waveguide Adapter, APC-7, 12.4 to 18 GHz
P281C
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The Keysight P281C adapter transforms waveguide transmission line into 50-ohm coaxial line. Power can transmitted in either direction, and each adapter covers the full frequency range of its waveguide band with SWR less than 1.3.
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Cable Fault Locating Equipment
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Commonly used to test underground coaxial and twisted pair cabling, along with transmission lines and other industrial electrical cables.
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Transmission Lines
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SemiGens 50-ohm Transmission Lines offer the RF/microwave designer complete flexibility and repeatability for the most challenging applications.
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Teleprotection
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Schweitzer Engineering Laboratories, Inc.
Teleprotection systems monitor and protect transmission lines using communications-assisted coordination between relays.
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Product
Directional Coupler
DCZ-XXE/Y
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The DCZ-XXE/Y directional couplers are used for extracting or introducing RF power flow in a transmission line withoutdistortion of signal characteristics. The directional couplers are available in 3, 6, 10, 15, 20 dB coupling values and30 - 35 dB minimum directivities*. 4-ports directional couplers are available in bi-directional (BDC4-XXE/Y) and dual-directional(DDC4-XXE/Y) configurations.
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Impedance Matching Pads
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Impedance matching pads from BroadWave eliminate impedance discontinuity (mismatches) without introducing reflection to the circuit. Custom units are available in a variety of impedance and connector types from DC to 4 GHz. BroadWave Technologies impedance matching pads preserve signal integrity by matching virtually any transmission line.
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Protection Device Testing
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The Motwane Manufacturing Company
Power system protection is a branch of electrical power engineering that focuses on protecting electrical power systems to detect and isolate faulty parts. The objective is to keep the power system stable by separating only the defective components while keeping the rest of the network in operation. The device protects the transmission lines, generator transformer, and other electrical apparatus from multiple faults.
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Shielding Effectiveness/ Conductivity Test
EM-2107A | 30 MHz – 1.5 GHz
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The EM-2107A is a standard test fixture for evaluation of the electromagnetic shielding effectiveness of planar material. The fixture is an enlarged section of coaxial transmission line and complies fully with the requirements of ASTM test method D4935-1. The measured data relates to the shielding effectiveness due to a plane wave (far field EM wave) from which near field values for magnetic and electric fields may be inferred. The EM-2107A is provided with a reference standard test specimen, a dynamic range specimen. Dynamic range of greater than 80dB is achievable, although the cables and other test system components usually establishes the limiting factors.
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Traveling Wave Fault Locator
XC-2100E
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XC 2100E, a Fault Location System based on principle of travelling wave detection is the solution to above problem. It can detect not only permanent fault, but also transient fault within one tower span accuracy (with best accuracy of ±50 meters). It is a kind of Line Monitor for continuous monitoring of transmission lines and gets triggered whenever travelling waves are generated on line due to switching, lightening or fault.
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Manual Tuners / Impedance Tuners
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Maury manual tuners are based on precision slide screw technology that utilizes broadband slab line transmission structure and passive probes to create impedances for devices. The probes are designed to be very close to onequarter wavelength in the linear dimension at the mid-band of each range. Since each tuner has two probes, this results in improved matching characteristics for each unit. Another key feature of this series of tuners is the inclusion of a LCD position readout of the carriage position on those units operating below 18 GHz. Higher frequency tuners utilize a micrometer carriage drive. The positional repeatability and high matching range of these tuners make them ideally suited for use as a variable impedance source in applications like device characterization. Such measurements depend upon the ability of the tuner to establish impedances out near the edge of the Smith chart and to reproduce the electrical characteristics as a function of mechanical position. The tuners in this series are also easy to use due to the nearly independent electrical results of the mechanical motions. The depth of penetration of the probe into the transmission line determines the magnitude of the reflection, while the position of the probe along the line determines the phase. While there is some interaction, the effects are almost independent of each other. https://www.maurymw.com/images/mw-rf/mst982e35.jpg
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Wattchman RF Station Monitor/Alarm Systems
81090
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The Coaxial Dynamics Wattchman Monitor/Alarm measures forward and reflected RF power simultaneously in 50-Ohm coaxial cables and transmission lines. It is compatible with our entire series of 7/8" through 6-1/8" Line Sections and will accept plug-in elements that range from 5 watts to 100 kW full scale from 0.45 MHz to 2300 MHz.
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EMCTD Broadband RF Safety Systems
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The EMCTD analog Smart Fieldmeter® is easy to read and to operate. The EMCTD broadband electromagnetic probe covers the 0.2 to 3000 MHz spectrum where most common industrial, communications, medical and government RF emitters are found. The ANGPE-3000 system enables checking of home, office, and workplace RF levels. The system is designed to conveniently measure RF levels around WiFi access points, RFID systems and rooftop antennas; to find transmitter cabinet radiation, locate transmission line leaks, to identify non-radiating antenna elements, and much more. With the supplied NIST-traceable calibration, this system supports laboratory testing of RF devices in compliance with present EMC and RF safety standards.
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Power Dividers & Splitters
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Keysight dividers and splitters are used in a wide range of applications, such as: transmission line fault testing, power combining, source leveling, ratio measurements, power splitting, and critical signal processing applications that require minimal insertion loss and high port isolation.
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LXI 2.4GHz 50ohm 8x4 Matrix
60-772-004
Matrix Switch Module
The 60-772 is a family of integrated RF matrices suitable for use up to 2.4GHz in a 50 ohm transmission line system. The matrix design permits any single Y input to be connected to any single X input, permitting the concurrent connection of 4 RF paths. All signal paths are bi-directional permitting any connection to be used as an input or an output.
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Product
(125×150×20mm) C-Band DWDM Line EDFA Module
WLA4200-FM05
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Hangzhou Huatai Optic Tech. Co., Ltd.
Huatai WLA4200-FM05 series is a gain flatness line EDFA Module which is specifically designed for C-Band 44 channels optic transmission system. It adopts the most excellent optical performance, the most advanced electronic control technology and the most complete software functionalities; it is featured with wide working wavelength range, low noise and excellent gain flatness. WLA4200-FM05 is mainly installed in middle of transmission line, replacing the traditional relay, to compensate the optical power loss in the line and extend the optical signal transmission distance
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LXI 2.4GHz 50ohm 16x8 Matrix
60-771-003
Matrix Switch Module
The 60-771 is a family of integrated RF matrices suitable for use up to 2.4GHz in a 50 ohm transmission line system. The matrix design permits any single Y input to be connected to any single X input, permitting the concurrent connection of 8 RF paths. All signal paths are bi-directional permitting any connection to be used as an input or an output.
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Product
Power Transmission Line Inspection System
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Shandong Senter Electronic Co., Ltd
With the aid of high-end technology and equipment, Senter Electronic manufactures and trades high-tech power transmission line inspection system with low price. And we are known as one of the leading such manufacturers and suppliers in China for our quality products and good service. Welcome to buy the power transmission line inspection system with our factory.
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Average Reading Directional RF Wattmeter
81000-A
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The Model 81000-A Wattmeter ... now you can measure RF Power in 50-Ohm coaxial cable and transmission lines, and accept plug-in elements in the range of 100 mW to 10 kW full scale, and from 0.45 to 2300 MHz.
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RF Cable Assemblies
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Transmission lines for radio frequency (RF) signals traveling from one point in a system to another (e.g., PC board to PC board, PC board to antenna, equipment to antenna, equipment to equipment, etc.).
