| 摘要 |
FIELD: antenna devices. SUBSTANCE: antenna of Cassegrain type with four-mirror beam guide has reflector on which last mirror of beam guide is mounted. Axis of next to last piece of beam guide is aligned to axis for rotation with respect to elevation. One of elevation rests which are located on azimuth rotation member has hole which diameter provides passing beam guide through it. One mirror of beam guide is mounted on cantilever, which is extended beyond said rest. Two other mirrors of beam guide are mounted on rotating bed which is located on azimuth rotation member and is mounted for rotation around vertical axis which is aligned to axis of beam guide. Center of one mirror is aligned with rotation axis of rotating bed. Emitters for each frequency range are located on azimuth rotation member around circumference with respect to rotation axis of rotating bed. In addition rotating bed has mechanism for angular movement and locking. Emitters are mounted at angle to rotation axis of rotating bed and are oriented in outer direction with respect to said axis. EFFECT: decreased time for switching between frequency ranges when possibility of antenna operations in several frequency ranges is provided, decreased time for antenna assembling and possibility for dismantling and moving stationary antenna to new position with minimal preliminary preparation. 3 cl, 4 dwg |
