What is a Coaxial Impedance Converter
Summary
BNC and N type Coaxial Impedance Converters.
Impedance Converters have the ability to perform impedance matching between different characteristic impedances.
Normally, impedance is converted from 50Ω to 75Ω or 75Ω to 50Ω.
There are three types of impedance conversion methods: conversion transformer, resistance, and transmission circuit, and they are used differently depending on the application and frequency bandwidth.
Why is impedance matching necessary?
When electronic devices are connected to each other, if their impedances do not match, signal reflection and attenuation occur, adversely affecting communication quality and measurement accuracy. To prevent this, “impedance matching” is necessary.
When devices with different impedances, such as 50 Ω and 75 Ω, are used in combination, it is essential to use an impedance converter to achieve matching in order to maintain the stability of the entire system.
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What happens if there is an impedance mismatch?
･ Signal reflection
Signals may bounce in the middle of the transmission line, resulting in incorrect delivery.
･ Power loss
Power is not transmitted to the device to which it should be delivered, resulting in a loss of efficiency.
･ Error in measurement results
If impedance matching is not achieved in the measurement system, accurate measurement is not possible.
Benefits of harmonization
･ Enables stable signal transmission
･ Prevents problems between devices
･ Improved accuracy of measurement and communication
BNC : Converters Transformer Type
BNC : Resistance conversion Type
N : Resistance conversion Type
N : Microstrip line Type
Main Applications of Impedance Converters
Impedance transducers are used to reduce signal reflection and loss when connecting devices of different impedances.
The main applications are as follows
･ Connection with measuring equipment
Used to connect equipment with different impedances, such as 50 Ω for the measuring equipment and 75 Ω for the object to be measured.
･ Broadcasting and video equipment
In the broadcasting industry, 75 Ω is commonly used, and transducers are required when connecting devices with different standards.
･ Wireless communication equipment
There are cases where conversion between 50 Ω and 75 Ω is required in the testing and connection environment of communication equipment.
50Ω↔75Ω Conversion : Common Usage Scenarios
The following cases are often seen as specific usage scenarios
･ Connection between a network analyzer (50Ω) and CATV equipment (75Ω)
･ Matching between video signal transmission line (75Ω) and measuring equipment (50Ω)
･ Connection between a professional camera (75Ω BNC) and a modulator (50Ω input)
In these situations, accurate impedance matching is required to prevent signal degradation and SWR (voltage standing wave ratio) deterioration.
Impedance Converter FAQs
QAre there any restrictions on frequency bands?
QAre there any restrictions on frequency bands?
Yes, each product supports different frequency bands. Please use the product links at the top for more information.
QCan I specify the connector type?
QCan I specify the connector type?
Standard products are BNC and N.
QWhat happens if I connect it as it is without using an impedance converter?
QWhat happens if I connect it as it is without using an impedance converter?
If connected with unmatched impedance, signal reflection or loss may occur, resulting in poor communication or measurement errors. The use of transducers is recommended to bring out the correct performance of the equipment.