| 摘要 |
A FLAT, LINEARLY POLARIZED, RADIAL LINE SLOT ANTENNA COMPRISES A WAVEGUIDE FORMED BY A PAIR OF CIRCULAR SHEETS (11, 12) OF CONDUCTIVE MATERIAL SEPARATED BY A LAYER OF DIELECTRIC MATERIAL (13) THE FIRST SHEET (11) BEING FORMED WITH A CONCENTRIC ARRAY OF RINGS OF NON- CONNECTING SLOTS (15), WITH AN AREA (17) OF THE SHEET (II) AROUND THE AXIS OF THE ARRAY HAVING NO SLOTS, THE AXIS OF THE ARRAY OF RINGS BEING OFFSET FROM THE AXIS OF THE FIRST SHEET (11) AND THE SECOND SHEET (12) HAVING NO SIOTS, AND A FEED CABLE (14,14A) EXTENDING COAXIALLY THROUGH THE SECOND SHEET (12) TO TERMINATE IN THE LAYER OF DIELECTRIC MATERIAL (13), WHEREIN THE SLOTS (15) ON THE FIRST SHEET (11) ARE ARRANGED IN PAIRS WITH ONE SLOT (ISA) OF EACH PAIR EXTENDING PERPENDICULAR TO THE OTHER SLOT (ISB) OF THAT PAIR AND TO THE ADJACENT SLOT (ISA) OF THE NEXT PAIR, THE SLOTS (15A,15B) OF EACH PAIR BEING-ORIENTED SUCH THAT FOR A PAIR OF SLOTS (15A,151) LYING ON A RADIUS OF THE ARRAY EXTENDING AT AN ANGLE P TO THE DIRECTION OF POLARIZATION (4) 0) THE AXES OF THE TWO SLOTS (15A,15B) ARE INCLINED TO THAT RADIUS AT ANGLES E1 AND 0Z, WHERE ‘81 = IT/2 -4)12 AND 02 = IT -4)12, THE CENTERS OF THE PAIRS OF SLOTS (I5A,15B) ARE SEPARATED BY 2Q2, WHERE X9 IS THE WAVELENGTH OF THE SIGNAL 2 IN THE DIELECTRIC LAYER AND THE THICKNESS OF THE DIELECTRIC LAYER IS D <AS 2 (FIG. 3)
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