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Current projects : 1. Materials characterization to 220GHz

Current projects : 1. Materials characterization to 220GHz 2. Novel mm-wave antenna structures at 60GHz and 77GHz 3. Multi-layer 15GHz circularly polarized antenna 4. Filters with defected ground planes 5. Adaptive antenna structures 6. Compact satellite antennas

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Current projects : 1. Materials characterization to 220GHz

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  1. Current projects: 1. Materials characterization to 220GHz 2. Novel mm-wave antenna structures at 60GHz and 77GHz 3. Multi-layer 15GHz circularly polarized antenna 4. Filters with defected ground planes 5. Adaptive antenna structures 6. Compact satellite antennas 7. Multifunction microwave antennas 8. Wireless sensors using carbon nano-tubes 9. Miniature microwave carbon nano-tube structures

  2. EPSRC Grant January 2004 - December 2006 £215k ‘Integrated antenna for millimetre-wave MCMs’ Charles Free and Manju Henry Outcomes so far: 1. Prototype 60GHz integrated antenna has been designed and successfully tested. 2. LTCC (low temperature co-fired ceramic) process has been established in the ATI at Surrey. 3. New technique has been established for minimising conductor losses at mm-wave frequencies to 110GHz.

  3. Future projects (under development): 1. Novel miniature microwave components based on carbon nano-tubes. 2. Integration of distributed optical components within a multi- layer mm-wave circuit to give optical-microwave coupling. 3. Hybrid microwave integrated circuits using mixed matrials technology. 4. Establishment of measurement standards for planar millimetre-wave circuits (with external collaborator). 5. Planar active microwave antennas, based on new polymer materials (with external collaborator). 6. Exploitation of GaN for millimetre-wave MMICs.

  4. Test structure Mode filter Measured loss tangent TE01 mode New slit-cavity technique for measuring mm-wave parameters of materials

  5. Measured high-quality circular polarization 15GHz LTCC antenna New concept for circularly polarized planar antennas

  6. 380um 180um r = 3.9 300um Alumina Multi-layer thick-film technology used to produce high quality planar microwave components

  7. Branch line coupler [ 2mm x 2mm ] Photoimageable thick-film technology has been used to produce miniature microwave components giving high performance Rat-race coupler [ 2mm x 1mm ]

  8. Microwave Laboratory Major Facilities: Testing: • Vector Network Analyzer Systems to 220GHz Fabrication: • Traditional thick-film • Photoimageable thick-film • LTCC (Low Temperature Co-fired Ceramic)

  9. Active External Collaborations: 1. Heraeus Inc (Germany and US) Characterization of ceramic materials at microwave and millimetre-wave frequencies. 2. University of Oulu (Finland) Microwave planar antenna using LTCC 3. Thales Aerospace (UK) Application of GaN in microwave devices 4. PECL (UK) Compact planar antennas using new polymer materials 5. University of Kent (UK) Integrated microwave antennas

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