Abstract: A duplexing apparatus comprises a hybrid junction module having an antenna port, a transmit port, a receive port and a balance port. The apparatus also comprises a feedforward circuit arranged to be responsive in respect of a first transmit band of frequencies and a second transmit band of frequencies, the feedforward circuit having an input operably coupled to the transmit port of the hybrid junction module and an output. The hybrid junction is arranged to isolate substantially the receive port from the transmit port in respect of the first transmit band of frequencies and substantially not to isolate the receive port from the transmit port in respect of the second transmit band of frequencies. The feedforward circuit is also arranged to favour propagation therethrough of signal frequencies in the second transmit band over signal frequencies in the first transmit band, thereby rendering a compensation signal at the output.

Abstract: A duplexing apparatus comprises a hybrid junction module having an antenna port, a transmit port, a receive port and a balance port. The apparatus also comprises a feedforward circuit arranged to be responsive in respect of a first transmit band of frequencies and a second transmit band of frequencies, the feedforward circuit having an input operably coupled to the transmit port of the hybrid junction module and an output. The hybrid junction is arranged to isolate substantially the receive port from the transmit port in respect of the first transmit band of frequencies and substantially not to isolate the receive port from the transmit port in respect of the second transmit band of frequencies. The feedforward circuit is also arranged to favour propagation therethrough of signal frequencies in the second transmit band over signal frequencies in the first transmit band, thereby rendering a compensation signal at the output.

Abstract: A liftable support structure for a turf system, the support structure comprising a skeletal framework having an open based structure with upstanding sides and at least two parallel spaced cross beams, the framework defining open subsections, each subsection having a base defining a ledge structure, each subsection supporting a latticework panel that sits on the ledge structure, the framework having a plurality of spaced lifting points and the cross beams defining access to forklift tines. A pallet for natural or artificial turf comprising a structure moulded in foamed plastics to have a closed planar top surface supported by a lattice work of mutually perpendicular walls defining a flexible open base, the structure defining a pair of elongate spaced parallel channels extending across each side to facilitate forklift tine entry.