Size-reduction techniques for CPW and ACPS structures

Hettak, K.; Laneve, Tony; Stubbs, M.G.

doi:10.1109/22.963145

Cited by 17 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the magnitude and the phase of the reflection coefficient changes as indicated by (5) and (6). By comparing (3) and (6) a linear phase response in a short stub is only achieved under the condition given by (7). Similarly for an open circuited stub, the same condition applies.…”

Section: Mathematical Analysismentioning

confidence: 90%

The Effect of Impedance Mismatch on Phase Linearity of GCPW Loaded Transmission Lines and Shunt Stubs

Ibrahim¹,

Szczepkowski²,

Farrell³

2014

25th IET Irish Signals &Amp; Systems Conference 2014 and 2014 China-Ireland International Conference on Information and Communi

View full text Add to dashboard Cite

-This paper presents a study on the effect of impedance mismatch on phase linearity (group delay variations) in grounded coplanar waveguide (GCPW) structures. Two 400 ps GCPW delay lines were designed using a short circuited stub and a transmission line. The structures were simulated over a wide frequency range (0.1 GHz-5 GHz) using both ADS circuit model and CST electromagnetic simulation tool. Based on mathematical analysis and simulation results, impedance mismatch appears to have a large effect on group delay variations in stubs when compared to transmission lines. The simulated time delay of the short circuited stub shows a maximum delay deviation of ±0.75% and ±7.4% for 1.6% and 5.8% impedance mismatch values, respectively. On the other hand, the transmission delay line simulation results show only ±0.1% and ±1.5% for the same impedance mismatch. For the electromagnetic simulation, the presented results indicate even larger variation of time delay for GCPW short stub as it reaches ±3.75% and ±7.5% at 2 GHz and 4.5 GHz for 1.6% impedance mismatch, respectively.

show abstract

Section: Mathematical Analysismentioning

confidence: 90%

The Effect of Impedance Mismatch on Phase Linearity of GCPW Loaded Transmission Lines and Shunt Stubs

Ibrahim¹,

Szczepkowski²,

Farrell³

2014

25th IET Irish Signals &Amp; Systems Conference 2014 and 2014 China-Ireland International Conference on Information and Communi

View full text Add to dashboard Cite

show abstract

“…A length reduced line without modifying it in other way, therefore, suffers from a loss of these distributed elements. Thus, an effective approach for size reduction is to offset the inductance and capacitance loss by redesigning the ACPSs with increased characteristic impedances and adding capacitive loadings to ground at each ends , as illustrated in Figure . The added capacitors require to be grounded which can also be utilized as air bridges to provide ground equalization.…”

Section: Analysis and Designmentioning

confidence: 99%

Miniaturization of a broadband power divider for X-band application based on GaAs technology

Han

Liao

2017

Microw. Opt. Technol. Lett.

View full text Add to dashboard Cite

In this letter, a miniaturized broadband power divider with novel configuration is proposed. Coplanar transmission lines of CPW and cascaded two sections of coupled ACPSs are utilized to achieve broadband performance. MIM capacitors are loaded at each ends of the ACPSs to realize size‐reduction along with ground equalization. Design equations are given in detail. The occupied area is about 3.5 × 0.6 mm2 and a significant size reduction of 61% is achieved. The fabrication process of this power divider with coplanar transmission lines is compatible with GaAs MMIC process. Broadband performance and perfect impedance matching are revealed by the measured results that the return loss S11 and S22 are both lower than −15 dB across the entire X‐band, 8–12 GHz. Good isolation and dividing properties are obtained with S23 better than −10 dB and S21 around −3.5 dB. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1427–1431, 2017

show abstract

“…Many miniaturization techniques incorporating CPW, coplanar strips, and slot lines on dielectric substrates have been investigated . In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. , a 30% size reduction was obtained by using series/shunt stubs in the design of a compact WPD using asymmetric coplanar stripline (ACPS) transmission lines. The concept of nonuniform transmission lines (NTLs), which was first introduced in Ref.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized multi‐frequency Wilkinson power dividers based on nonuniform coplanar waveguide

Jaradat

Dib

Shamaileh

2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

In this work, the design of miniaturized dual‐ and triple‐ frequency Wilkinson power dividers using nonuniform coplanar waveguides is presented. The miniaturized configurations are achieved by replacing the conventional uniform arms with their equivalent multi‐frequency nonuniform transmission lines. The nonuniform width variation is governed by a truncated Fourier series expansion with coefficients optimized to obtain the desired multi‐frequency operation. The optimization process is carried out through the analysis of the even/odd mode circuits. The proposed dividers are simulated, fabricated, and measured to validate the design methodology. Simulated and measured results agree very well, and show input/output ports return loss and isolation better than 14.4 dB and transmission parameters in the range of −3 ± 2 dB at the design frequencies. Size reduction of 16.7% and 17.6% are achieved for the fabricated dual‐ and triple‐frequency dividers, respectively.

show abstract

Size-reduction techniques for CPW and ACPS structures

Cited by 17 publications

References 3 publications

The Effect of Impedance Mismatch on Phase Linearity of GCPW Loaded Transmission Lines and Shunt Stubs

The Effect of Impedance Mismatch on Phase Linearity of GCPW Loaded Transmission Lines and Shunt Stubs

Miniaturization of a broadband power divider for X-band application based on GaAs technology

Miniaturized multi‐frequency Wilkinson power dividers based on nonuniform coplanar waveguide

Contact Info

Product

Resources

About