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US 2001/0043128 A1Published application
Broadband flexible printed circuit balun
AssigneeBAE Systems Information and Electronics Systems Integration Inc.
InventorZane Lo
Life of this patent
Estimating the term…
Abstract
The present invention provides a compact slotline balun implemented on a 10-mil thick printed circuit card. The balun utilizes a transition region configuration of a six-port network to achieve a good impedance match and low insertion loss across a wide operating band. The balun is typically manufactured using standard printed circuit techniques which yield a thin, flexible, dimensionally stable device.
Claims13
A thin, broadband balun, comprising:
- a) a substrate having a first surface and a second surface, a first edge and a second edge;
- b) a stripline disposed on said first surface and extending from a connection proximate said first edge to a predefined interior junction point thereupon;
- c) an open-circuit stripline stub disposed on said first surface and extending radially a predetermined distance from said junction point and being electrically connected to said stripline at said junction point;
- d) a short-circuited stripline stub disposed on said first surface and extending radially a predetermined distance from said junction point and being electrically connected to said stripline at said junction point;
- e) a slotline disposed on said second surface for interfacing with an external device, said slotline connecting said junction point and a terminus proximate said second edge;
- f) an open-circuit slotline stub disposed on said second surface and extending radially a predetermined distance from said junction point and being electrically connected to said slotline at said junction point;
- and
- g) a short-circuited slotline stub disposed on said second surface and extending radially a predetermined distance from said junction point and being electrically connected to said slotline at said junction point.
5 more elements
A thin, flexible, wideband, broadband printed circuit balun, comprising:
- a) a substrate having a first surface and a second surface, a first edge and a second edge;
- b) a meandering stripline disposed on said first surface and extending from a connection proximate said first edge to a predefined interior junction point thereupon;
- c) an open-circuit stripline stub disposed on said first surface and extending radially a predetermined distance from said junction point and being electrically connected to said stripline at said junction point;
- d) a short-circuited stripline stub disposed on said first surface and extending radially a predetermined distance from said junction point and being electrically connected to said stripline at said junction point;
- e) a slotline disposed on said second surface for interfacing with an external device, said slotline connecting said junction point and a terminus proximate said second edge and having a flared portion proximate said terminus;
- f) an open-circuit slotline stub disposed on said second surface and extending radially a predetermined distance from said junction point and being electrically connected to said slotlie at said junction point;
- and
- g) a short-circuited slotline stub disposed on said second surface and extending radially a predetermined distance from said junction point and being electrically connected to said slotline at said junction point.
5 more elements
Dependencies are inferred from the claim text.