Related Experiment Video
Updated: Oct 18, 2025
08:42
How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters
Published on: April 16, 2015
20.0K
A compact high-power microwave TM01-TE01 mode converter
Yong-Jun Hu1, Liang Xu2, Qiang Zhang2
1Office of Facility and Laboratory Management, National University of Defense Technology, Changsha 410073, China.
The Review of Scientific Instruments
|October 2, 2021
Summary
This study presents a compact and efficient mode converter for high-power microwaves (HPMs), transforming the TM01 mode to the TE01 mode. The designed converter achieves over 98% transmission efficiency and handles over 1 GW, crucial for long-distance HPM transmission.
Area of Science:
- Electromagnetics and Wave Propagation
- Microwave Engineering
- High-Power Microwave (HPM) Technology
Background:
- The TE01 mode in circular waveguides offers minimal transmission loss, ideal for long-distance high-power microwave (HPM) transmission.
- HPM sources predominantly generate the TM01 mode, necessitating efficient TM01-TE01 mode conversion for practical applications.
- Existing TM01-TE01 mode converters often lack compactness and are challenging to fabricate.
Purpose of the Study:
- To design a novel, high-efficiency mode converter for transforming the TM01 mode to the TE01 mode for HPM applications.
- To develop a compact and easily processable TM01-TE01 mode converter structure.
- To experimentally validate the performance and power handling capabilities of the designed mode converter.
Main Methods:
- Design of a compact mode converter comprising an input circular waveguide, tapered rectangular waveguide, 90° bent rectangular waveguide, and output circular waveguide.
- Fabrication of a prototype device centered at 2.4 GHz.
- Experimental testing of the fabricated prototype to measure transmission efficiency and power handling capacity.
Main Results:
- Simulated transmission efficiency reached 99.8%.
- Measured transmission efficiency exceeded 98%.
- Measured power handling capacity surpassed 1 GW, consistent with simulations.
Conclusions:
- The designed mode converter is compact, efficient, and suitable for HPM applications.
- The device demonstrates significant potential for long-distance HPM power transmission.
- This design offers valuable insights for future development of HPM mode converters and power transmission systems.
Related Concept Videos
01:16Maximum Power Transfer
500
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
By substituting the entire circuit with...
500
01:22MOSFET: Enhancement Mode
529
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
529
01:20Power Factor Correction
297
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
297
01:20Design Example: Capacitance Multiplier Circuit
1.0K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.0K
01:17MOSFET Amplifiers
253
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
253
01:20Half wave rectifier
1.9K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
1.9K