Assertion: radar's antenna | /r/HasProperty | required in addition
Facets:
value: to very complex waveguide plumbing
type: OTHER
value: to switching
type: PURPOSE
Source sentences:
text: In practice, the waveguide switching arrangement is cumbersome and prone to losses ( four separate antennas or four separate feed horns are required in addition to very complex waveguide plumbing and switching techniques ).