This paper describes a 2.4-GHz fully-integrated front-end receiver including single-pole triple-throw (SP3T) switch and low-noise amplifier (LNA) with bypass function, which was fabricated in 0.25 μm GaAs pHEMT process. An asymmetrical SP3T architecture is incorporated to enable the operate four modes. The exploration of impedance voltage gain behavior proposed LNA help establish matching netwo...

Conventional CMOS switch uses NMOS as transistors in its main architecture requiring a control voltage of 5.0V and a large resistance at the receivers and antennas (ANTs) to detect the signal. A CMOS integrated circuit switch uses FET transistors to achieve switching between multiple paths, because of its high value of control voltage. Hence it is not suitable for modern portable devices which ...

We propose and demonstrate a cost-effective half- duplex transceiver for Fiber-to-the-Room (FTTR) network by using homemade uncooled isolator-free distributed feedback (DFB) laser as both receiver (Rx) transmitter (Tx). AlGaInAs multiple quantum wells (MQWs) partially corrugated grating are utilized operation of the DFB lasers. Tx/Rx mode switching is implemented specially designed complementar...

In this paper, we have analyzed the Double-Pole Four-Throw Double-Gate Radio-Frequency Complementary Metal-Oxide-Semiconductor (DP4T DG RF CMOS) switch using S-parameters for 1 GHz to 60 GHz of frequency range. DP4T DG RF CMOS switch for operation at high frequency is also analyzed with its capacitive model. The results for the development of this proposed switch include the basics of the circu...

A compact single-mode photonic crystal fiber single-mode fiber tip (SPST) refractive index sensor is demonstrated in this Letter. A CO2 laser cleaving technique is utilized to provide a clean-cut fiber tip, which is then coated by a layer of gold to increase reflection. An average sensitivity of 39.1 nm/RIU and a resolvable index change of 2.56×10(-4) are obtained experimentally with a ∼3.2 μm ...

New approaches are needed for improving the performance of small antennas to fulfill the multiband operation requirements of future wireless mobile communications terminals. In this paper, a novel low-loss frequencytuning circuit for mobile handset antennas is proposed. The presented design takes into account several factors that affect the practical mobile handset antenna design, such as the b...

The InAlAs/InGaAs metamorphic HEMT (mHEMT) two-stage Ka-band amplifier and DC-30 GHz distributed SPST switch were designed and fabricated using low-k benzocyclobutene (BCB) bridged technology. This fabrication technology takes the advantages of its low dielectric permittivity (2.7), low loss tangent (0.008), low curing temperature, low water up-take, and simple manufacturing process. The MMIC f...

This paper describes the design and evaluation of a Single Pole Double Throw (SPDT) switch IC covering DC to 20GHz. Two SPDTs are realised on each die to give a dual channel part for use in systems where accurate gain and phase matching between channels is vital. The switch was fabricated on Triquint Semiconductor Texas’ 0.25μm PHEMT process and has a measured insertion loss of less than 1dB to...