When Signal integrity is of the utmost importance, New England Wire Technologies can design and manufacture twin axial cable to meet the characteristic impedance, capacitance and attenuation requirements of your application.
Balanced Pair (Twinax)
Twisted pairs have been used for decades as a low cost means to reduce interference between signal wires and surrounding electronics. When an electromagnetic field encounters an electrical conductor a voltage is induced in the wire. You may have noticed that having your cell phone too close to your speakers will result in odd noises when you receive a phone call. In digital applications induced voltages will interference with data transfer and result in lower performance or a complete loss of signal integrity.
Balanced circuits were developed as a means to reduce the effects of EMI on signal cables. In traditional wire, the signal is a function of a voltage in a single line, in balanced circuits a signal is a function of the voltage differential between two signal lines. When a balanced circuit is placed in an electromagnetic field, the voltage is generated in both lines, effectively canceling each other out.
To maintain the effectiveness of a balanced circuit, the signal lines have to control two parameters. First, each line has to have comparable impedance, which ensures that an electrical field will generate the same voltage in each line. Second, each line has to be subjected to the field in approximately the same way. Twisting the lines together helps control both of these parameters, the transposition of the wires ensures that each leg is exposed to EMI in the same approximate way, and helps consistently maintain the parameters that effect impedance.
Twisted pairs are used in a variety of consumer goods, Category cable, USB and HDMI all employ twisted pairs for signal lines.
- Reduced Voltage – Less susceptible to EMI, twisted pairs can use lower operating voltages which can both improve efficiency and data speeds
- Improved Flexibility – Since coaxes require large dielectric layers and metallic shielding, cabled twisted pairs can offer significant increases in flexibility.
- Lower Cost – Requiring fewer operation and less materials to manufacture, twisted pairs are an excellent lower cost alternative to coaxes.
New England Wire uses planetary cabling equipment for multiconductor cables; this equipment ensures reliable and consistent transposition for twisted pairs. We also use inline electrical monitoring to ensure high quality and consistent electrical performance on all our products.