Broadband transmission line transformer

Details Broadband transmission line transformer Broadband transmission line transformer

2009-07-23

2010-11-23

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S033000

Reexamination Certificate

active

07839232

ABSTRACT:
A broadband transmission line impedance transformer performs impedance transformation with improved frequency response and efficiency across a wide operational bandwidth. In particular, the bandwidth of a transmission line 2:1 impedance transformer may be significantly increased by adding an additional compensating capacitor as an internal component between interconnected transmission lines. This capacitor effectively improves low frequency response for a given length of transmission lines and decreases mismatch in an entire frequency range. The overall bandwidth ratio increases at least twice and mismatch decreases.

REFERENCES:
patent: 4554518 (1985-11-01), Baer
patent: 5309120 (1994-05-01), Koontz
patent: 5767754 (1998-06-01), Menna
patent: 6018277 (2000-01-01), Vaisanen
patent: 6535077 (2003-03-01), Hiroshima et al.
patent: 649050 (1979-02-01), None
London, S. et al., “Line Transformers with Fractional Transformer Factor”, Telecommunication and Radio Engineering, vol. 238/29, pp. 129-130, Apr. 1974.

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