| 摘要 |
A waveguide element for an electrically controlled radar antenna comprises a non-resonant waveguide (V) fed from a feed opening (M). The feed opening divides the waveguide longitudinally into a first and a second part, each provided at its outer end with absorbent terminations (A1, A2). Slits (S11, S12, S21, S22, etc) are formed in the waveguide, and their central points in the longitudinal direction have in the first part a mutual spacing (d1) which is less than half the wavelength ( lambda g/2), while their central points in the longitudinal direction in the second half have a mutual spacing (d2) which is greater than half the wavelength.
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