Miniaturized Distributed MEMS Impedance Matching Networks
Due to the desire of using a single
antenna to cover a wide range of wireless communication standards, a tunable
impedance matching network is required. This modern impedance matching network
should provide large impedance matching abilities, such as low loss, small size
and low price. Many reconfigurable impedance matching networks have already been
realized based on semiconductor devices. However, these designs suffer from the
high power consumption and unwanted intermodulation products. Current
development is more focused on the impedance matching networks using MEMS
technology because of their low insertion loss and power consumption.
Unfortunately, these designs cannot provide a satisfied impedance coverage on
the smith chart in low band wireless communications unless they occupy a quite
large area. To improve the impedance matching ability with a reasonable size,
the electrical length of some slow-wave structures as the transmission line is
investigated for reducing the system operating frequency compared to
traditional coplanar waveguide (CPW). On the base of this idea, new DMTLs are
desired for improving the impedance coverage with a compact size in wireless
The proposed SW-DGS transmission line is a combination of SW and DGS structures implemented on a CPW line.
The lower the uniformity factor is, the more uniform is the impedance distribution. Hence this proposed structure provides a more uniform distribution with the same physical length or the structure requires a smaller size for achieving the desired impedance coverage on the Smith chart compared to other DMTL structures up to 10 GHz.
- Y. Chen, and D.
Manteuffel, "Distributed MEMS Impedance Matching Network Using a SW-DGS Technique", In Antennas Propagation Conference, 2012. LAPC 2009. Loughborough., nov., 2009. , pp. 50 -56.
- Chen, Y. and Manteuffel, D. , "Miniaturizing of a Distributed MEMS Impedance Matching Network,", Antenna Technology (iWAT), 2013 International Workshop on , vol., no., pp.303,306, 4-6 March 2013.
- Y. Chen, and D. Manteuffel, "Distributed MEMS Impedance Matching Network Using a SW-DGS Technique", In Antennas Propagation Conference, 2012. LAPC 2009. Loughborough., nov., 2009. , pp. 50 -56.