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An accurate approach to characterize the sheet impedance of thin conductive ink in rectangular waveguide is reported. This method allows retrieval of the sheet impedance without prior characterization of the supporting dielectric substrate. The ink sample is positioned between two waveguide flanges, introducing a discontinuous gap. The effect of the physical discontinuity can be removed by an additional...
In this article, a surface mounted device (SMD) common-mode choke (CMC) required for unshielded-twisted-pair automotive communication systems (like 100Base-T1) is characterized in detail regarding its high-frequency filtering characteristics. Firstly, the S-parameters and mixed-mode S-parameters of the mentioned choke were measured using a 4-port vector network analyzer in a frequency range of 1 MHz...
This paper presents the electrical characterization for fine lines on organic substrate using TDR. Micro-strip line (MSL) and grounded coplanar waveguide (GCPW) two structures are studied and fabricated. Impedance between 1GHz and lossless is about 10 ohms gap for both structures. This changes the impedance matching design concept because conduction loss of fine lines can't be ignored as conventional...
Recently, the S-parameter method using a vector network analyzer was proposed whereby the differential input impedance of a balanced-fed antenna was obtained. To improve measurement accuracy of the S-parameter method, the dependence on the thickness of the semi-rigid cable used for the measurement jig is obtained from the results of calculations using the FDTD method. Three types of jigs each made...
Recently, the S-parameter method using a vector network analyzer and a measurement jig instead of a balun was proposed whereby the differential input impedance of a balanced-fed antenna were obtained. As no balun is used, measuring impedance over a wide frequency bandwidth is now possible. To improve measurement accuracy of the S-parameter method, the dependence on thickness of the semi-rigid cable...
Recently, the S-parameter method using a vector network analyzer was proposed whereby the differential input impedance of a balanced-fed antenna were obtained. To improve measurement accuracy of the S-parameter method, the dependence on thickness of the semi-rigid cable used for the measurement jig is obtained from the results of calculations using the FDTD method. Three types of jigs each made from...
Recently, the S-parameter method using a vector network analyzer and a measurement jig instead of a balun was proposed whereby the differential input impedance of a balanced-fed antenna were obtained. As no balun is used, measuring impedance over a wide frequency bandwidth is now possible. To improve the measurement accuracy of the S-parameter method, the dependence on direction of SMA connectors...
This paper presents an evolution of a conducted immunity measurement technique for integrated circuits: the Resistive RF Injection Probe (RFIP) test method. This method complements the Direct Power Injection (DPI) method by giving different immunity parameters (voltage, current, impedance, power). After a brief description of the method, immunity parameters computation is detailed and both RFIP probe...
Recently, S-parameter method that is the measurement method of the input impedance of the balanced antenna is proposed. It is a problem of this method that the jig influences measured value when the measurement frequency increases. To remove the influence of the jig, we have examined compensating method using the ABCD-matrix. In this report, to remove the influence of the jig, we propose a novel open...
In this paper, a de-embedding method is proposed to measure the impedance of an innovative O-shape spring contact, for frequency up to 30 GHz. To allow the de-embedding method to be applied in practical situations, both conductor loss and the discontinuity associated with the junction are taken into account. Results obtained from the de-embedding method are validated using full wave simulation. In...
Recently, S-parameter method that is the measuring method of the input impedance of the balanced antenna with a vector network analyzer is proposed. It is a problem of this method that the jig influences measured value when the measuring frequency in-creases. To remove the influence of the jig, we have examined compensating method using the ABCD-matrix. In this report, we examine the effect of the...
This paper describes input impedance of tapered slot antenna (TSA) measured by S parameter method and comparison with simulation. As the result, we confirm the reliability of the measurement data.
Errors due to inevitable cable flexure are one of the major error and uncertainty sources in high-precision S-parameter measurements. Recently developed two-port electronic calibration units allow for determination and correction of these errors. A method is presented where such a unit is applied to de-embed cable flexure errors in S-parameter measurements. In a series of steps, the effects of the...
The characterization of passive component properties over a wide frequency range is usually done using scattering parameters. This paper presents the measurement and modeling approach for two typical three-phase mains chokes (3×100μH, 230V, 60A and 3×2.3mH, 230V, 65A) based on six-port scattering parameters using a common two-port vector network analyzer. The model allows to reproduce consistently...
Recently, a measurement technique called S-parameter method using a vector network analyzer has been proposed whereby the differential impedance can be found. In this paper, three compensating methods using ABCD-matrix are adopted to reduce the influence of a jig for the S-parameter method. The results of our proposed methods are presented and compared with a calculated result using the method of...
This paper describes two different methods for examination of SMA connector properties. One method is based on measurement of connector scattering parameters and the second method is based on measurement of frequency dependent input impedance of manufactured sample. The sample consists of short microstrip line segment with 50 Ω characteristic impedance and of two edge mounted SMA connectors. The properties...
In recent years, many wireless telecommunication services have spread over the world. It is known that the characteristics of conventional antennas, such as monopole antennas, change considerably when the body of the handset is touched by the hand. This is caused by the variation of the current on the surface of the conducting box used for the handset due to human body influence. To decrease the influence...
We present an impedance characterization method for THz antennas using coplanar probe measurements. The antenna structure, which is typically monolithically integrated with detector diodes, is represented as a two-port network. The impedance seen by the diode can be analytically extracted using reflection coefficient measurements from the other remote location of the antenna. The diode port is replaced...
A balanced fed antenna for the portable radio terminal is received increasing attention due to reduction of the human influence. Recently, a technique called S-parameter method using a standard network analyzer has been proposed whereby the differential impedance can be found. In this paper, four compensating methods using cascade matrices are adopted to reduce the influence of a jig for the S-parameter...
Two-current probes method and S-parameter method are studied comparatively for conductive EMI noise source modelling in this paper. Firstly, the basic theory of the two-current probes method and S-parameter method are introduced for noise source impedance extraction. Secondly, ZX and Zsetup are important intermediate results in the two methods, therefore their extractions are analyzed respectively...
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