Isotropic dry-etching of SiC for AlGaN/GaN MEMS fabrication. - In: Conference on Optoelectronic and Microelectronic Materials and Devices, 2008, ISBN 978-1-4244-2716-1, (2008), S. 26-29
http://dx.doi.org/10.1109/COMMAD.2008.4802084
Active DVB-T antenna: evaluation of noise figure and gain with far field measurements. - In: IEEE International Symposium on Consumer Electronics, 2008, ISBN 978-1-4244-2422-1, (2008), insges. 4 S.
http://dx.doi.org/10.1109/ISCE.2008.4559422
Tunable dual-band microwave devices based on a combination of left/right-handed transmission lines. - In: 38th European Microwave Conference, 2008, ISBN 978-2-87487-005-7, (2008), S. 273-276
Metamaterial transmission lines can be realized as a combination of transmission line sections with positive and negative dispersion. Such lines, which are also known as right- and left-handed transmission lines, exhibit different dispersion characteristics. Compared to homogeneous networks, the use of cascaded line sections gives additional degrees of freedom for improving the performance of microwave devices. For the design process, LC-equivalents of the right- and left-handed transmission line sections are used. This facilitates the consideration of tunable capacitors, e.g., varactor diodes, to provide frequency tuning of the devices. At the same time, the geometrical dimensions of the devices can be drastically reduced. This paper presents the results of simulation and experimental investigation of a miniature rat-race-ring and a dual-band filter free of spurious response, both manufactured as fully-integrated ceramic multilayer modules based on Low-Temperature Co-fired Ceramics. The design of tunable versions of these devices is also discussed.
http://dx.doi.org/10.1109/EUMC.2008.4751441
Bandpass filters for Ka-band satellite communication applications based on LTCC. - In: 38th European Microwave Conference, 2008, ISBN 978-2-87487-005-7, (2008), S. 211-214
http://dx.doi.org/10.1109/EUMC.2008.4751425
Novel Wilkinson-type power dividers based on metamaterial transmission lines. - In: 38th European Microwave Conference, 2008, ISBN 978-2-87487-005-7, (2008), S. 341-344
This paper focuses on applications of the metamaterial left-handed transmission lines to the design of novel Wilkinson-type power dividers. Novel configurations of broadband 180&ayn; Wilkinson power dividers suitable for practical implementation are proposed. A concept of designing dual-band Wilkinson power dividers based on a combination of right-handed and lefthanded transmission line sections is considered as well. A band broadening technique for the dual-band Wilkinson power dividers is discussed.
http://dx.doi.org/10.1109/EUMC.2008.4751458
Broadband decoupling and matching of a superdirective two-port antenna array. - In: IEEE antennas and wireless propagation letters, ISSN 1548-5757, Bd. 7 (2008), S. 613-616
http://dx.doi.org/10.1109/LAWP.2008.2006767
Performance measurements of a two-branch diversity receiver with superdirective antenna array and decoupling and matching network. - In: IEEE Antennas and Propagation Society international symposium, 2008, ISBN 978-1-4244-2041-4, (2008), insges. 4 S.
http://dx.doi.org/10.1109/APS.2008.4619165
Impedance measurement of a dipole above a periodically structured reflective surface. - In: IEEE antennas and wireless propagation letters, ISSN 1548-5757, Bd. 7 (2008), S. 617-620
http://dx.doi.org/10.1109/LAWP.2008.2006636
180˚ power dividers using metamaterial transmission lines. - In: 14th Conference on Microwave Techniques, 2008, ISBN 978-1-4244-2138-1, (2008), insges. 4 S.
http://dx.doi.org/10.1109/COMITE.2008.4569917
Eigenmode decoupling of miniaturised diversity antennas using compact quasi-lumped networks. - In: Loughborough Antennas & Propagation Conference, 2008, ISBN 978-1-4244-1893-0, (2008), S. 89-92
http://dx.doi.org/10.1109/LAPC.2008.4516873