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A low-profile, small-size (10 × 40 mm2 on a thin dielectric substrate) planar LTE/WWAN antenna suitable for slim laptop computer applications is presented. The antenna is formed by a coupled-fed loop and a reconfigurable circuit element. The reconfigurable circuit element is substantially positioned at the current nulls of the two higher-order resonant modes of the coupled-fed loop, thereby altering...
In RF wireless communication systems, oscillator plays the role of providing signals, therefore high stability and low phase noise oscillator is very important. This paper use the negative resistance theory of FET, let the circuit is in an unstable state. And the use of dielectric resonator (DR) as a signal source, design of the dielectric resonator oscillator (DRO) operating frequency is 10.5GHz...
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