A novel EMPIMC (evanescent-mode phase-injection mode-coupled metamaterial resonator) based tunable signal sources is discussed for the applications in portable and test & measurement equipment applications. The reported paper features tunable multi-band oscillators with significantly reduced size and power consumption compared to separate oscillators for use in multiple bands, multi-mode wireless communication systems. With the development of the MMIC fabrication techniques and the broad application of this artificial material, metamaterial technology is a promising alternative to high frequency planar VCO solutions for current and later generation radio communication systems.