Radio Design Ltd.

Shipley, United Kingdom

Radio Design Ltd.

Shipley, United Kingdom

Time filter

Source Type

Hunter I.,University of Leeds | Musonda E.,University of Leeds | Parry R.,Radio Design Ltd | Guess M.,Radio Design Ltd | Meng M.,University of Leeds
IEEE MTT-S International Microwave Symposium Digest | Year: 2013

A new concept for the design of power combiners based on matched directional filters is presented. The directional filters consist of individual balanced sections composed of hybrids and single resonators. Each of the sections corresponds to a pole of an all-pass function composed of the sum of S11 and S12 of the desired filter transfer function. A simple synthesis method is presented. The filter combiner has the advantage of ease of tunability because each pole is associated with a single resonator. Furthermore, no cross couplings are required to realize finite frequency transmission zeros. © 2013 IEEE.


Hunter I.C.,University of Leeds | Musonda E.,University of Leeds | Parry R.,Radio Design Ltd. | Guess M.,Radio Design Ltd. | And 3 more authors.
IET Radar, Sonar and Navigation | Year: 2014

A new concept for the design of power combiners based on matched directional filters is presented. The directional filters consist of individual balanced sections composed of hybrids and single resonators. Each of the sections corresponds to a pole of an all-pass function composed of the sum of S11 and S12 of the desired filter transfer function. A simple synthesis method is presented. The filter combiner has the advantage of ease of tunability because each pole is associated with a single resonator. Furthermore, no cross-couplings are required to realise finite frequency transmission zeros. Experimental results for a prototype device are presented. © The Institution of Engineering and Technology 2014.


Patent
Radio Design Ltd | Date: 2013-11-06

A tower mounted amplifier is provided including a first receive section capable of receiving one or more radio frequency signals substantially in a first frequency band and the same receive section or at least a second receive section capable of receiving one or more radio frequency signals in at least a second frequency band. The tower mounted amplifier further includes one or more transmit sections capable of transmitting one or more radio frequency signals substantially in said first and/or at least second frequency bands. A single amplification means is provided in or associated with the first receive section or the first and at least second receive sections for amplifying one or more radio frequency signals in both said first and at least second frequency bands.


Patent
Radio Design Ltd | Date: 2013-02-20

The invention relates to combining apparatus and a method of use of the same in relation to use with transceivers in a wireless communication network and to allow at least two allows two BTSs to share an antenna system whilst preventing noise generated or associated with one of the BTSs which falls within the receive signal frequency band, from leaking into the receiver of the other BTS.


Patent
Radio Design Ltd | Date: 2016-07-20

A ceramic filter apparatus is provided including at least one ceramic body portion having one or more resonating means defined therein. At least part of said ceramic body portion has an outer electrically conductive coating or surface provided or formed thereon. At least a portion of said outer electrically conductive coating or surface is arranged to provide one or more walls of a housing for one or more electronic or radio frequency (RF) components provided in the apparatus in use.

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