US 7,443,263 B2 · Wide-bandwidth balanced transformer

Abstract

The present invention comprises novel means and apparatus which provide both impedance matching of arbitrary impedances and transformation between single-ended, floating, and balanced circuits over very wide operating bandwidths with very low excess loss and very low phase and magnitude ripple in the pass band. The present invention can provide high-performance matching, for example from a 50-ohm single-ended system to a 100-ohm balanced system over a bandwidth of 10 kHz to 10 GHz with an excess loss of less than nominally 1 dB and a bandpass magnitude ripple of less than ±0.5 dB. The present invention also provides precision low-loss power division over very wide-bandwidth. The novel means, according to the present invention, can utilize commonly available materials and can be optimized for specific applications to tailor performance to specific needs and to simplify assembly and reduce cost.

Claims17

Dependent claims

A wide-bandwidth transformer providing a wide-bandwidth transformation mechanism between impedances comprising:

1. a plurality of transmission-line sections;
2. a plurality of signal ports;
and
3. at least one Mobius Gap device,
wherein said transmission-line sections are interconnected to provide impedance transformation from at least an impedance at a first port to an impedance at a second port, and said Mobius Gap device provides means to allow said transmission lines to be connected together in a manner to optimize high-frequency, wide-bandwidth connection of said transmission-line sections;
and
wherein there is further included low frequency isolation mechanisms, said low frequency isolation mechanism including magnetic devices surrounding said transmission-line segments to increase magnetizing inductance.

4 more elements

Dependencies are inferred from the claim text.

Wide-bandwidth balanced transformer

Life of this patent

Wide-bandwidth balanced transformer

Life of this patent

Abstract

Claims17