WIDE BAND PRINTED PHASE ARRAY ANTENNA FOR MICROWAVE AND MM-WAVE APPLICATIONS

摘要

The present invention relates to a phase array antenna comprising a dielectric substrate (1)comprising a front and a back dielectric face (2, 3), a plurality of dipole means (4), eachcomprising a first and a second element (5, 6) for radiating and receiving electromagneticsignals, said first elements (5) being printed on said front face and pointing in a firstdirection and said second elements (6) being printed on said back face (3), and pointing ina second direction opposite to said first direction, metal strip means (7) for supplyingsignals to and from said dipole means (4), said metal strip means (7) comprising a firstline (8) printed on said front face (2) and coupled to said first element (5) and a secondline (9) printed on said back face (3) and coupled to said second element (6), and reflectormeans (10) spaced to and parallel with said back face (3) of said dielectric substrate (1), alow loss material (11) being located between said reflector means (10) and said back face(3), and having a dielectric constant less than 1.2, whereby said first and second lines (8,9) respectively comprise a plurality of first and second line portions (13, 14), said first andsecond line portions (13, 14) respectively being connected to each other by T-junctions(15), whereby each of said first and second line portions (13, 14) is tapered between twoadjacent T-junctions (15), so that the width of each line portion (13, 14) increases towardssaid first and second elements (5, 6), respectively, to provide an impedance transformationin the succeeding T-junction (15). The present invention relates to a low cost wide bandplanar printed antenna solution for microwave and mm-wave range. A particular solutionfor 60 GHz is introduced.