This paper presents a quadrature injection locked frequency divider (ILFD) employing tunable active inductors (TAIs), which are used is to extend the locking range and to reduce die area. The CMOS ILFD is based on a new quadrature voltage-controlled oscillator (VCO) with cross-coupled switching pairs and TAI-C tanks, and was fabricated in the 0.18-μm 1P6M CMOS technology. The divide-by-2 LC-tan...

In this paper Micro strip Patch Antenna Array are designed and analyzed for WLAN application, which operating at S-band frequency Range of 2.4 GHz. Antenna arrays are used to achieve higher gain. The larger number of antenna elements, the better gain of antenna array is achieved. In this paper feeding element and power divider is used to design the 4 X 1 micro strip patch antenna array. Micro s...

This paper presents dual-band equal/unequal Wilkinson power dividers based on a coupled-line section with short-circuited stub (called as the “coupled-line section” for short), which consists of a pair of parallel coupled lines and a short-circuited stub. With the analyses of the phase shift and equivalent characteristic impedance, the coupled-line section is used to replace the quarter-wavelen...

Background: As a significant terahertz functional device, terahertz beam splitters with high performance are highly required to meet the need for terahertz communication, terahertz image, and terahertz sensor systems. Results: The proposed 1×6 power splitter becomes 1×4 power splitter with the aid of the localized temperature change at the frequency of 1.0THz. The total output power is equivale...

We realize and investigate a wavelength-flexible phase-coherent all-optical frequency-by-2 divider. Frequency division is obtained via self-phase locking in a degenerate continuous-wave (cw) optical parametric oscillator (OPO). The wavelength flexibility of the divider is based on the use of quasiphase matching (QPM) with perpendicular polarizations of the OPO output waves (type II). Mutual inj...

In this paper, a Y-shaped power splitter based on a two dimensional photonic crystal (PhC) for TE modes is designed and optimized. A triangular lattice of air holes is used for Y-shaped power divider. For analyzing these structures, plane wave expansion (PWE) and finite difference time domain (FDTD) methods are used. The simulation results show that more than 98% of the input power is transmitt...

Starting from the scattering matrix formulation, three useful properties are derived that characterize the dissipative loss and the corresponding efficiency of a multi-port, passive microwave network. Elementary examples are considered that involve both reciprocal and nonreciprocal networks to demonstrate the utility of the expressions provided. When applied to the equal-split, matched, three-p...

|A voltage controlled di erential injection locked frequency divider (VCDILFD) with a large locking range is designed in a 0:24 m CMOS technology. A 29% locking range is achieved by an optimal inductor design and also by employing high Q accumulation mode MOS varactors to change the free{running oscillation frequency of the divider. The measurement results show frequency division at 5GHz with m...

This paper presents an unequal Wilkinson power divider operating at arbitrary dual band without reactive components(such as inductors and capacitors). To satisfy the unequal characteristic, a novel structure is proposed with two groups of transmission lines and two parallel stubs. Closed-form equations containing all parameters of this structure are derived based on circuit theory and transmiss...