A compact wideband high-rejection microstrip bandstop filter (BSF) is presented. This combines two traditional BSFs: open-stub and spurline filter. Due to the inherently characteristics of spurline, proposed shows a better rejection performance than BSF without increasing circuit size. From 3.7 5.4 GHz, has 20 dB maximum level 61 dB. Application this suppress second harmonic an open-loop ring bandpass also investigated with 40-dB suppression improvement achieved.

Integration of bandstop filters with the or bandpass filter are presented in this paper. By replacing series quarter-wavelength connecting lines conventional open-stub bandpass/bandstop equivalent T-shaped lines, one could have compact bandstop/bandpass second harmonic suppression. Transmission-line model calculation is used to derive design equations lines. Experiments also been done validate concept. Compared filters, over 30-dB improvement suppression and 28.6% size reduction achieved.

This letter describes a compact 5.8-GHz rectenna using stepped-impedance dipole antenna. In comparison to the conventional uniform half-wavelength antenna, antenna shows 23% length reduction. is then used receive microwave power for rectenna. The maximum conversion efficiency of 76% at 5.8 GHz with load resistance 250 Omega. Furthermore, better than 67% from 5.725 5.875 GHz, which covers entire ISM band.

In this study, two multi-band antennas and one broadband antenna using slot stepped-impedance resonators (SIRs) coplanar waveguide (CPW) feeding have been investigated. All of the proposed are fabricated on 1-mm FR4 substrates with a relative dielectric constant 4.4 loss tangent 0.02. comparison to conventional uniform-impedance resonator (UIR), SIR shows better control over spurious response. way, dual-band (antenna A) tri-band B) could be designed at desired bands. Antenna A is implemented...

A bandpass Wilkinson power divider with a wide stopband is proposed in this letter. three-terminal and two-pole filter two lowpass filters are employed to substitute quarter-wavelength transformer the conventional divider. The achieves not only response but also very stopband. rejection greater than 20 dB up 22.2 f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> . Experiments carried out validate design concept of

Wide-band microstrip line to coplanar stripline (CPS) transitions are proposed. The transition consists of a multisection matching transformer and quarter-wavelength radial stub for the impedance field between CPS, respectively. proposed planar has advantages compact size, wide bandwidth, straightforward design procedure. Several parameters studied through simulations experiments derive some guidelines. With return loss better than 14 dB, 1- 3-dB back-to-back insertion bandwidth can cover...

This letter presents a compact multisection sharp-rejection microstrip low-pass filter. Each section consists of line and an interdigital capacitor. The analysis for optimizing the attenuation poles by adjusting finger number, width length section, is presented. cascaded four-section filter has return loss better than 17 dB insertion less 0.7 from DC to 1.6 GHz. rejection 20 2.1 7.5

Emerging radar applications require phased arrays that can operate over wide bandwidths to support multiband/multifunction operation. In response need, this paper presents a cost-effective implementation for extremely wide-band phased-array radars. Two designs are demonstrated, one operating from 3 12 GHz and the other 8 20 GHz. These incorporate ultra-wideband antipodal tapered slot antennas, novel cross-polarization suppressed array architecture, piezoelectric true-time-delay phase...

This paper describes the design of millimeter-wave wide-band monolithic GaAs passive high electron-mobility transistor (HEMT) switches using traveling-wave concept. type switch combined off-state shunt transistors and series microstrip lines to form an artificial transmission line with 50-/spl Omega/ characteristic impedance. A 15-80-GHz single-pole double-throw (SPDT) in conjunction quarter-wavelength impedance transformers demonstrates insertion loss less than 3.6 dB isolation better 25...

A compact microstrip quadruplexer with high isolation is presented in this letter. The consists of a distributed coupling feeding line, output lines and uniform resonator pairs. Since the resonators would resonate at multiple fundamental frequencies, to obtain high-isolation quadruplexer, are properly located respect input suppress harmonic responses. Furthermore, because each pair control specific channel frequency independently loading effect among channels very small, proposed has...

Using a ferroelectric PbZrTiO3 gate stack, the range of steep subthreshold swing in tunnel field-effect transistors was extended by 3.5 orders magnitude demonstrating an improvement (by approximately double slope). The drain conductance (gd) shows only 16% enhancement with large V DS (∼−1.5V) indicates internal voltage amplification negative capacitance effect beneficial to small lateral drain-source bias voltages (−0.1 V). concept coupling polarization is proposed. power consumption also...

A penta-band coplanar waveguide (CPW)-fed slot dipole antenna with two comb-like metal sheets is proposed in this letter. Each operation band controlled by a respective resonant path, and results high design freedom. The operates at 1.88 (f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> ), 2.34 xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> 2.70 xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> 3.08...

This letter presents a miniaturized dual-mode microstrip bandpass filter with the right crossed slots. The slots perturb and reduce fundamental resonant frequency, but second resonance is not affected. Therefore, will be effectively higher than 2f/sub o/, where f/sub o/ frequency. Since frequency lower, smaller conventional filter. proposed shows 4.4% fractional bandwidth at 1.595GHz return loss of better 10dB an insertion less 2.5dB, while passband located around 2.88f/sub o/= 4.6GHz....

A quad-band bandpass filter utilising stub-loaded resonators is presented. The symmetric resonator analysed by using even-mode and odd-mode technique. provides one transmission zero four poles for the passbands. With multi-line input/output coupling configuration multipath propagation between meandering resonators, can generate two additional zeros to improve suppression among passbands achieve a high design freedom

A microstrip triplexer with high isolation is proposed in this letter. The utilizes multi-mode resonators, stepped-impedance and distributed coupling technique. To begin with, we design a diplexer near passbands according to the excitation condition of resonators. first passband excited odd mode, second one even mode. In way, can improve isolation. Furthermore, without increasing any circuit size, be promoted due third channel using

Compact sext-band bandpass filter based on stepped-impedance resonators is presented. Two types of rejection responses beside passbands can be designed by I/O gap capacitance. Considering design freedom and circuit complexity, each pair determine respective channel characteristics. The proposed filters occupy an extremely small area 0.26λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">g</sub> × 0.15λ as well keep good selectivity among channels.

A microstrip eight-channel diplexer with a compact size and wide stopband is presented. There are sixteen stepped-impedance resonators controlling the passband characteristics. Every two used for one resulting in high design freedom. four passbands filtered out at each of output ports. The circuit only 0.1 λg <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> lowest channel frequency. isolation more than 29 dB, 20 dB upper extends up to...

This paper presents two microstrip elliptic-function low-pass filters, one using distributed elements and a slotted ground structure. The consists of line section in parallel with an interdigital capacitor; the other structure low-impedance cell under center line. A transmission-line model full-wave simulation are used to calculate inductance/capacitance values equivalent circuits. design concept was validated through experiments showing good agreements simulated results

A switchable microstrip bandpass filter (BPF) with reconfigurable on-state frequency responses is proposed. The consists of a two-pole BPF and two delay lines. proposed features not only switch ability an on-off ratio 41.2 dB but also responses: Chebyshev response quasi-elliptic-function response. Experiment was carried out to validate the design concept, simulation agrees well measurement.

A quad-band bandpass filter using a meandering structure is proposed. The proposed consists of two sets stepped-impedance resonators with structures and pair feeding lines four-diverged shape. Considering the design freedom circuit size, each determines passbands. advantages include generating transmission zeros for better passband selectivity, suppressing harmonic passband, reducing size.

In this paper, using semilumped resonators, one sext-band bandpass filter and sextaplexer are proposed. The two circuits fabricated microstrip technology, the resonator consists of identical lines a chip inductor at center. comparison with conventional half-wavelength uniform resonator, is compact has better control over harmonic frequencies. addition, utilize distributed coupling technique to integrate channel filters. This low loading effect resulting in high design freedom that essential...

A reconfigurable bandpass filter (BPF) is presented using a resonator with switchable number of transmission poles at 1.5 GHz. The consists uniform resonator, p-i-n diode, and an open loop. diode used to connect/isolate the loop to/from resonator. When loaded, has three poles, BPF achieves wideband response. On other hand, one pole, exhibits narrow-band response when disconnected. In comparison previous work, proposed features compact size, low insertion losses, minimum number, fair passband...

A broadband microstrip bandpass filter using a stub-loaded resonator is proposed. The basic block of the proposed triple-mode that consists half-wave and shunt open-circuited stub. parameter study how to control frequencies three modes presented. Two filters have been designed, fabricated tested validate design concept. Design guidelines comparison with previous work are also included. For first filter, from 1.75 3.25 GHz, measured return loss greater than 16 dB insertion less 0.9 dB....

This letter presents a switchable diplexer composed of stepped-impedance distributed coupling feeding line, four different quarter-wavelength resonators (SIRs), two shunt open stubs, p-i-n diodes, and bias circuitry. Compared with previous works, the proposed circuit features compactness, wide stopband, high selectivity, independently channels. To suppress harmonics, various SIRs same fundamental frequency but harmonic frequencies in stagger are used. Open stubs also adopted to achieve an...

A compact double-mode cross-coupled microstrip bandpass filter with an asymmetric frequency characteristic and three transmission zeros is presented. The consists of a gap resonator half-wavelength line shunt-stepped-impedance open stub. In comparison to the conventional square loop dual-mode resonator, proposed achieves 59% size reduction. parametric studies on electrical length stub capacitance cross-coupling are provided in order gain better insight into poles zeros. Then, designed,...