About: http://webisa.webdatacommons.org/102448620

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Alternatively, coupler 140 shown in FIG. 3 may be a device such as circulator, or switch as shown in FIG. 4, to permit a single antenna to function as both a transmit and a receive antenna.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com