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Typical and proposed recycling folded cascade (RFC) amplifier have been designed in TSMC 0.18 μm. Simulated and measured results are compared. Proposed RFC demonstrate an enhancement on DC gain by 5 dB almost for the same power consumption and bandwidth. Moreover, it realized less input referred noise than typical. Split-length devices (SLD) method is applied on proposed (RFC) to create...
We present an ultra-wideband bandpass filter with -15dB suppression between 5.15-5.8GHz utilizing second order band elimination filter (BEF). The filter consists of a modified step impedance resonator (SIR) and two interdigital coupled line. Two parallel coupled stubs are attached to the SIR to create a second order BEF, which introduce a sharp and wide enough notch. HFSS was used to optimal the structure,...
In this paper, we designed and tested ESAs with impedance matching circuits having different gain. We succeeded in implementing the circuit which matches the small radiation resistance of ESA to amplifier. Measured results are close to the simulation value. So we proved possibility to design and fabricate ESA with high radiation efficiency.
We designed and fabricated an electrically small antenna (ESA) with coplanar waveguide (CPW) matching circuit. Matching circuit is realized by using an interdigital gap and a transmission line. We designed ESA with the aid of the commercial three-dimensional electro magnetic field simulator. We also made experiments on the ESA with CPW matching circuits using patterned circuit board.
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