This paper proposes a compact ultra-wideband filter, which skillfully utilizes the magnetic and capacitive coupling to obtain sharp rejection. And, the filter contains a small number of lossy elements, thus the low insertion loss and compact size will not be compromised. The measured results show that the filter prototype has a measured 3 dB fractional bandwidth of 128% from 2.8 GHz to 11.4 GHz...

Dual band bandpass filter is designed and optimized for RF wireless applications. The performances of that RF dual band filter are improved especially parameters describing the insertion loss, return losses and rejection. Dual band bandpass filter using stub loaded resonators is designed and characterized. Theoretical results are compared with experimental data. This comparison shows that the m...

Time-interleaved ∆Σ (TIDSM) DACs have the potential for a wideband operation. The performance of a twochannel interleaved ∆Σ DAC is very sensitive to the duty-cycle of the half-rate clock. This paper presents a closed-form expression for the SNDR loss of such DACs due to duty cycle error for modulators with a noise transfer function of (1 − z−1). Adding a low-order FIR filter after the modulato...

This paper addresses a modified bandpass ring resonator filter providing compact size, low insertion-loss, wide bandwidth, sharp rejection and suppressed higher order modes. The filter enhancement follows a threefold approach. First, UC-PBG structures are used to suppress the higher order passbands yielding an upper stopband that reaches 4.7 GHz, beside offering a further advantage in terms of ...

Acoustic echo cancellers in today' s speakerphones or video conferencing systems rely on the assumption of a linear echo path. Low-cost audio equipment or constraints of portable communication systems cause nonlinear distortions, which limit the echo return loss enhancement achievable by linear adaptation schemes. These distortions are a superposition of different effects, which can be modelled...

Abstarct: A Band Pass Filter is one of the key components in the receive chain of any Transmit-Receive Module of an Active Array Radar. The critical parameter for the design of a BPF for a TR module is the form factor,insertion loss and rejection. Hence a microstrip based interdigital (tapped) BPF for S-Band TR Module (3.1-3.5 GHz) was designed. The filter was designed to achieve a typical inse...

A Quad-band bandpass filter for wireless RF devices is presented. The circuit is capable of serving multiple FDD and TDD bands of the 4G LTE standard. A microstrip transmission line is used to feed stepped impedance resonators for providing four bands in LTE spectrum. The proposed filter is simulated using IE3D simulator. The centre frequency and bandwidth of each passband can be controlled by ...

In this paper, an acoustic echo canceller (AEC) based on an M-channel infinite-impulse response (IIR) cosine-modulated filter bank (CMFB) with near-perfect reconstruction (PR) property is proposed. The use of a 2-channel lossless lattice section with 1 st order allpass filter in the design of the prototype filter that is common to both the analysis and the synthesis filter banks permits the fil...

A novel robust finite-horizon Kalman filter is presented for networked linear time-varying systems with norm-bounded parameter uncertainty whether, or not, the data packets in the network are time-stamped. Measured data loss and latency in the communication link are both described by a Bernoulli distributed random sequence. Then, a two-stage recursive structure is employed for the robust Kalman...

Abstract Numerous studies have shown that careful particle size selection is the main parameter for reducing fluid loss when drilling permeable or fractured formations. The methods are generally built around either D50 D90 values of particles in as a relative to pore openings formation minimize loss. A series were conducted with aim assessing if analysis could be used separate internal and exte...