The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1999
Filed:
Apr. 19, 1996
Ming-Jong Shiau, Cerritos, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A microwave grating 10 for a dispersive delay line, the grating comprising: (a) a terminal 12 for receiving a wideband RF signal including multiple RF signals of different frequencies; (b) a primary transmission line 14 capable of carrying the wideband RF signal, the primary transmission line 14 being electrically connected to said terminal 12; and (c) a plurality of non-resonant open-stub transmission lines 16 each having a length 18, the open-stub transmission lines 16 being capacitively loaded on the primary transmission line 14 at spaced locations 20 along the primary transmission line 14. Each open-stub transmission line 16 effects perturbations in the signal carrying capability of the primary transmission line 14 where the open-stub transmission line is located. As such, RF signals of different frequencies propagating through the primary transmission line 14 are reflected back to the terminal 12 of the grating 10 at different points along the primary transmission line 14 where the open-stub transmission lines 16 are located. Preferably, the spacing 22 between a pair of adjacent open-stub transmission lines 16 is substantially equal to a multiple half-wavelength of a selected frequency, whereby an RF signal of said frequency propagating through the primary transmission line 14 is reflected back at a point along the transmission line 14 where the spacing 22 between a pair of open-stub transmission lines 16 is equal to a multiple half-wavelength of the signal.