An Equivalent Circuit Modeling Method for Ultra-Wideband Antennas

Wang, Yong; Li, Jiazi; Ran, Lixin

doi:10.2528/pier08032303

Cited by 34 publications

(21 citation statements)

References 22 publications

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“…This structure is widely accepted, as can be found from many papers, e.g., in [3,16]. In this study, the model is determined for the wideband single-resonant dipoles in Figure 1, evaluated further for the operation of multi-resonant dipole, and finally applied for the characterization of their impedance behaviour.…”

Section: Equivalent Circuits For Single-and Multi-resonant Dipole Antmentioning

confidence: 99%

“…Also the impulse kind of nature of UWB increases the challenge of antenna design since the reflection coefficient S 11 should appear as non-resonant type (i.e., smooth) to diminish the harmful ringing effect [2] that might be strong for antennas having high impedance variation over the frequency band. Challenges of the co-design of UWB antenna/circuit interface are also reported in [3,4]. Since matching circuits can cause additional time-delays [5] for a broadband antenna and typically increase transmission loss, the impedance matching components for UWB are not feasible in practice.…”

Section: Introductionmentioning

confidence: 99%

“…Equivalents can be applied in many ways as, for instance, 1) to model an antenna, 2) to understand the antenna operation, 3) to compute the antenna matching potential [13], and so forth. Naturally, the impedance properties of a circuit model must correlate perfectly with the modelled antenna [14], which might cause challenge especially for UWB antennas since the parameters are frequency-dependent [3]. Since UWB antennas are characterized to act as a pulse-shaping filter [2], it is proposed that equivalent model should also be to capture a possible UWB antenna waveform distortion [15] in order that a designer can find out ways to mitigate it.…”

Section: Introductionmentioning

confidence: 99%

“…First, planar UWB dipole antenna simulation models that are redesigns of the traditional single-and multi-resonant dipole structures are designed for the frequencies of interest. Then, antenna equivalent circuit model structures to be studied are chosen based on the literature review in the previous publications [3,16,18] and common circuit theory [20]. Finally, the circuit component values are defined by following the consideration of the correspondence between equivalents and physical antenna dimensions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impedance Dependency on Planar Broadband Dipole Dimensions: An Examination With Antenna Equivalent Circuits

Tuovinen¹,

Berg²

2014

PIER

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Abstract-The present paper considers the connection between complex input impedance and the physical dimensions for planar ultra wideband (UWB) antennas. The first time the effect of both the actual radiator width and length for impedance behaviour is comprehensively presented. Also the effect of feed point dimensions on complex impedance is studied. The investigations involve both UWB single-resonant dipoles to cover bandwidth ≥ 500 MHz and a multi-resonant dipole for the entire Federal Communications Commission's (FCC) frequency band of 3.1-10.6 GHz. Lumped-element equivalent circuits are used identically with 3D antenna simulations in order to observe the corresponding impedance behaviour with the studied antennas. The used equivalent circuits consisting of seriesand parallel-resonant stages are widely accepted in the open literature. The series-resonant circuit of equivalent is observed to have the analogue to the antenna feeding area. The physical dipole dimensions in terms of a length and width are connected to parallel-resonant part, which mainly determines the antenna input impedance. The resistance of a parallel-resonant stage behaves as the maximum value of real part of dipole impedance with an influence on bandwidth together with the ratio of parallel capacitance C and inductance L. The increase of the antenna physical width has an effect on bandwidth, because of the wider the antenna, the higher the capacitance in the antenna feed. Since the traditional dipoles are used for these studies, the results can be extended in several ways for other antenna types or, for instance, to verify the effect of body tissue, close to a wearable antenna.

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Section: Equivalent Circuits For Single-and Multi-resonant Dipole Antmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impedance Dependency on Planar Broadband Dipole Dimensions: An Examination With Antenna Equivalent Circuits

Tuovinen¹,

Berg²

2014

PIER

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“…In general, wideband equivalent circuits of microstrip antennas are determined by using optimization techniques [11][12][13][14]. In case of the equivalent circuit that models double resonant microstrip antennas, Kajfez devised a systematic approach to calculate the starting values of the involving optimization [11].…”

Section: Introductionmentioning

confidence: 99%

An Approach to Equivalent Circuit Modeling of Rectangular Microstrip Antennas

Ansarizadeh¹,

Ghorbani²,

Abd-Alhameed³

2008

PIER B

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Abstract-Computation of the broadband matching potential of a microstrip antenna requires the wideband lumped equivalent circuit of the antenna. The general topology of the equivalent circuit of rectangular microstrip patch antennas has been used to model the feedpoint impedance of microstrip antennas over a wide frequency band and equivalent circuit parameters are determined using optimization techniques. The proposed procedure overcomes the problems of physical realizability of the equivalent circuit and estimation of the starting values of the optimization. Applying this technique, wideband lumped equivalent circuits of a rectangular and E-shaped microstrip antenna have been computed which are in good agreement with measurement data from 0.1 to 6 GHz.

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Circuit modeling for ultra‐wideband Tx‐Rx antenna systems based on frequency domain S‐parameters

Wang¹,

Li²,

Wu³

2011

Int J Numerical Modelling

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SUMMARYThis paper presents a circuit modeling procedure for Ultra-wideband (UWB) Tx-Rx antenna systems based on frequency domain S-parameters. The modeling used an existing two-port network's model consisting of four SPICE analog behavioral modules. The accuracy of the model has been validated by comparing its transient response with the measurement result using an oscillograph. This model can be used for the co-design of the UWB Tx-Rx antenna system with transmitters and receivers in circuit simulators. In the study, Tx-Rx antenna systems using planar bow-tie antenna and horn antenna with ultra-wide bandwidths are used as examples.

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An Equivalent Circuit Modeling Method for Ultra-Wideband Antennas

Cited by 34 publications

References 22 publications

Impedance Dependency on Planar Broadband Dipole Dimensions: An Examination With Antenna Equivalent Circuits

Impedance Dependency on Planar Broadband Dipole Dimensions: An Examination With Antenna Equivalent Circuits

An Approach to Equivalent Circuit Modeling of Rectangular Microstrip Antennas

Circuit modeling for ultra‐wideband Tx‐Rx antenna systems based on frequency domain S‐parameters

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