GHz Power Divider Research Articles

A novel miniaturized Wilkinson power divider with nth harmonic suppression

In this paper, a miniaturized Wilkinson power divider using a novel technique for nth harmonic suppression is presented. In this technique, a novel low-pass filter (LPF) is inserted into each quarter-wavelength transmission line of the conventional Wilkinson power divider and open stubs are used at each port. For verification, the proposed 1 GHz power divider and the miniaturized LPF are fabricated and measured. The presented structure not only impressively suppresses the harmonics (2nd–12th) with high levels of attenuation, but also significantly reduces the size over 71% of the conventional one. The overall size of the fabricated power divider is only 14.1 mm × 18.2 mm (0.06 λg × 0.08λg).

Design of 2.4 GHz power divider with harmonic suppression

A 2.4 GHz power divider with harmonic suppression is presented. It comprises two sets of hook-shaped resonators in each branch. By adjusting the widths and lengths of the hook-shaped strips, it is convenient to control the third and fifth harmonic suppression separately without affecting the passband performance. Experimental results show insertion losses of 3.453 and 3.341 dB, the return loss of 19.3 dB and better than 14 dB isolation at the centre frequency. Furthermore, excellent out-of-band rejection can be observed, including 46.2 dB suppression for the third harmonic and 37.35 dB suppression for the fifth harmonic.

Compact dual-band power divider using non-uniform transmission line

A compact dual-band power divider using a non-uniform transmission line (NTL) is presented. The realisation of this dual-band impedance matching NTL is evolved from a direct synthesis method. Corresponding design equations are proposed to calculate the design parameters and a 0.915 GHz/2.45 GHz power divider is fabricated for proving the validity of this design. The measured data and anticipated results demonstrate good agreement.

Wideband impedance‐transforming three‐port power divider using lumped elements

AbstractIn this article, we propose a new wideband impedance‐transforming three‐port power divider using lumped elements. Instead of a π‐network used in the conventional lumped Wilkinson power divider, an L‐type matching network is employed in the new design, which keeps quality(Q)‐factors low during impedance transformation, allowing wideband performance. The simulation proves that the proposed power divider achieves wider bandwidth than the conventional one in the performance of return loss, isolation and insertion loss. A 2 GHz power divider which transforms the impedance from 25 to 50 Ω was designed using the derived equations. The measurement showed the insertion loss of −3.3 dB, return loss of −27.1 dB and isolation of −24.7 dB at 1.9 GHz with broadband performance. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2570–2573, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24675

Design of Novel Compact Coupled Microstrip Power Divider With Harmonic Suppression

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A new microstrip power divider (PD) is proposed which consists of a pair of parallel coupled-lines (PCLs) on a defected ground, and its two outputs are connected by a resistor and a capacitor. The even/odd-mode analysis shows that the defected ground structure (DGS) etched on the ground plane of PCL is equivalent to a strong parallel resonance circuit in the case of even-mode, and a weak inductance in the case of odd-mode. So, this kind of additional reactance effect is used intentionally to design compact coupled microstrip PD with harmonic suppression. Also, the phase-delay through the PD is discussed, which is different from conventional one. A 0.9 GHz PD is developed and experimental results verify it has low insertion loss, good impedance matching and isolation. Furthermore, the third harmonic suppression of this PD is better than <formula formulatype="inline"><tex Notation="TeX">${-}35$</tex></formula> dB and the overall area of divider is only 34% of the conventional case. </para>

Micromachined 28-GHz power divider in CMOS technology

A broad-band power divider is presented in CMOS technology. The devices are realized by postprocessing chips that are fabricated in a standard 1.2-/spl mu/m CMOS process. Developed postprocessing includes wire bonding for ground equalization, deposition of a stress-compensation layer, and selective etching of the silicon substrate. By employing coupled coplanar transmission lines, the area of dividers is minimized to 0.8 mm/spl times/2.1 mm. A 20-35 GHz power divider exhibits a coupling of -3.8 dB/spl plusmn/0.6 dB.