Experimental Study of Symmetric Microstrip Bends and Their Compensation

Douville, R.; James, Dick

doi:10.1109/tmtt.1978.1129340

Cited by 111 publications

(44 citation statements)

References 17 publications

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“…For all right-angled bends simulated, for all frequencies, the radiation loss is negligible. These results agree with [3,4], [6].…”

Section: Reflectionsupporting

confidence: 89%

“…For an initial design it suffices to decide whether or not to apply a miter and to restrict ourselves to the α=45 0 , b=0.5√2W (or 50%) miter, see figure 1c. The α=45 0 , b=0.5√2W miter appears to be the optimum miter for wide lines and appears to improve the reflection over the unmitered case for all widths, heights, permittivities and frequencies considered, [3]. The reflection levels for unmitered and 50% mitered bends are shown in table 2 for typical values of l at the central frequencies.…”

Section: Reflectionmentioning

confidence: 95%

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Equivalent length design equations for right-angled microstrip bends

Visser

2007

2nd European Conference on Antennas and Propagation (EuCAP 2007)

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For printed antenna systems, microstrip feeding networks may become quite complex, including several right-angled bends. In designing feed networks we have to consider reflection levels at and electrical lengths of the bends. Removing a part of the area of metallization in the bend's corner can compensate for the excess capacitance and reduce the reflection level of the bend. Full wave simulations have been performed for unmitered and (50%) mitered right-angled bends in microstrip on FR4 and FR4 -like substrates in the frequency range 868MHz -60GHz. The simulations revealed that for reflection levels below -15dB, up to 10GHz mitering is unnecessary. For reflection levels below -20dB, mitering must be applied for frequencies in excess of 2.5GHz. A slight modification of the centreline approach for unmitered bends leads to an equivalent electrical length for unmitered bends with an absolute accuracy of less than one degree for all frequencies and substrates, where the reference planes may be brought back all the way to the bend. Applying this modification to 50%-mitered bends, having the reference planes at 0.2λ g distance from the bend, λ g being the wavelength in the substrate, leads to an absolute error in electrical length of less than two and a half degrees for all frequencies and substrates.

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“…For all right-angled bends simulated, for all frequencies, the radiation loss is negligible. These results agree with [3,4], [6].…”

Section: Reflectionsupporting

confidence: 89%

Section: Reflectionmentioning

confidence: 95%

Equivalent length design equations for right-angled microstrip bends

Visser

2007

2nd European Conference on Antennas and Propagation (EuCAP 2007)

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“…12 shows the normalized electric length for both discontinuities. Comparison of numerical data with measure- ments [27] for susceptance and electric length shows excellent agreement.…”

Section: B Right-angle and Mitered Bend Discontinuitiesmentioning

confidence: 62%

Full-wave spectral-domain analysis of compensation of microstrip discontinuities using triangular subdomain functions

Horng

McKinzie

Alexopoulos

1992

IEEE Trans. Microwave Theory Techn.

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Abstract-This paper presents a full-wave spectral-domain analysis to investigate compensation of a variety of microstrip discontinuities including open-ends, bends and T junctions. To properly model the discontinuities with miters as well as 90°c orners, vector-valued triangular subdomain functions are used as both expansion and testing functions in the moment method procedure. Special consideration is given to the numerical treatment of the reaction integral between two triangular subdomains such that rather complicated geometrical configurations can be handled very efficiently. Comparison of some numerical results with available experimental data show? excellent agreement. The losses due to radiation and surface waves for some discontinuities are also included.

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“…In order to reduce its effect, the L bend is mitred optimally at 45 0 using the empirical expressions (Equations (3), (4), & (5)) given by Douville and James [8].…”

Section: Antenna Design and Evolutionmentioning

confidence: 99%

On the Design of Ultra Wide Band Rectangular Slot Antenna Excited by a Flared Microstrip Feed Line

Khokle¹,

Kumar²,

Krishna³

2013

PIER C

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Abstract-A rectangular slot antenna for UWB applications is proposed in this paper. The slot is designed in stepped configuration and is excited by an L-shaped microstrip line flared at the end. The measured impedance bandwidth (−10 dB) from 3 GHz to 27 GHz is achieved. The radiation patterns are bidirectional in the E plane and omnidirectional in the H plane with the measured peak gain around 5 dBi throughout the band. The experimental results are in good agreement with the simulated results. A detail parametric study is done for the flare angle and the flare width to axis ratio and their effect on the impedance bandwidth and the reflection coefficient is described.

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Experimental Study of Symmetric Microstrip Bends and Their Compensation

Cited by 111 publications

References 17 publications

Equivalent length design equations for right-angled microstrip bends

Equivalent length design equations for right-angled microstrip bends

Full-wave spectral-domain analysis of compensation of microstrip discontinuities using triangular subdomain functions

On the Design of Ultra Wide Band Rectangular Slot Antenna Excited by a Flared Microstrip Feed Line

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