The phase center of horn antennas

Muehldorf, E. I.

doi:10.1109/tap.1970.1139799

Cited by 100 publications

(35 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because the phase center can be treated as an equivalent point source -i.e., the "true" reference point of the antennaunder a far-field condition. Muehldorf [13] theoretically determined the phase center of rectangular and diagonal horn antennas. However, for other broadband antennas with com- plex structures, it is difficult to calculate the phase center using the same theoretical approach as that used for horn antennas.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Far-Field Gain Determination at Reduced Distances Using Phase Center

Harima

2014

IEICE Trans. Commun.

View full text Add to dashboard Cite

SUMMARYThis paper describes numerical analyses of the distancedependent gain variation that exists in gain measurements based on the Friis transmission formula for typical broadband antennas, including doubleridged guide horn and log-periodic dipole array antennas. The analyses are performed by simulating gain measurements using the method of moments with higher-order basis functions and the finite integration method. In addition, we propose approximate techniques to determine the antenna phase center by exploiting the distance dependence of the gain. Simulation and experimental results show the effectiveness of using the location of the phase center to accurately determine the far-field gain at reduced antenna separation distances. key words: gain measurement, Friis transmission formula, method of moments, finite integration method, phase center

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Far-Field Gain Determination at Reduced Distances Using Phase Center

Harima

2014

IEICE Trans. Commun.

View full text Add to dashboard Cite

show abstract

“…The phase center position of a real antenna is not concentrated in one single point and changes with the frequency, θ, and φ [22], with the highest standard deviation in the direction of radiation, which is why the biggest deviations in Table I occur for δz. Fig.…”

Section: Aut Phase Centermentioning

confidence: 99%

Reflection Reduction Through Modal Filtering for Integrated Antenna Measurements Above 100 GHz

Boehm

Foerstner

Hitzler

et al. 2017

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Abstract-Feeding integrated antennas during a measurement requires special feeding structures. Due to the small antenna dimensions these feeding structures are often much bigger than the antenna under test (AUT) itself and with chip sizes of around 1 mm 2 , the achievable separation between antenna and feed is limited. Wafer probes have to be used to feed the AUT during passive antenna measurements and present a large reflective surface in close proximity to the AUT. Reflections from the wafer probe cause interference on the measurement surface and distort the results. The same is true for active antenna measurements, where bondwires and the package can have a significant effect on the radiated fields. The fragility and size of the components do not allow to reduce reflections with absorbers, which is why modal filtering was used in this paper to mitigate undesired reflections and improve the measurement result through post processing. Two issues that limit the performance of the algorithm are discussed, namely phase center inaccuracies of the AUT and a limited measurement surface.It is shown that modal filtering is applicable to integrated antenna measurements at frequencies over 100 GHz and that a significant improvement in the measured radiation pattern can be achieved. Furthermore, it is shown that the post processed results make it possible to measure the directivity of integrated antennas, despite strong probe reflections.

show abstract

“…Moreover, the phase center location affects the antenna gain [3,4] and the phase [1]. For the antenna phase center determination, an analytic solution is available for a simple horn antenna [5]; numerical solutions have been commonly used recently [1,3,4]; many experimental methods have also been reported [2,6,7]. These experimental methods are based on a measurement of the phase pattern in the frequency domain.…”

Section: Introductionmentioning

confidence: 99%

Determination of the phase center position and delay of a Vivaldi antenna

Hai

Suzuki

2013

IEICE Electron. Express

View full text Add to dashboard Cite

We propose a new method for the antenna phase center determination based on measurement. The phase center position and the delay of wave propagation through a Vivaldi antenna are estimated from the measured arrival-time of a multi-offset transmission signal. The estimated phase center position agrees well with that determined by a numerical simulation. The estimated delay has also been validated to have a good accuracy by a laboratory experiment. Then we demonstrate that the accuracy of the range distance estimation by a radar system using a Vivaldi antenna can greatly be improved by considering the phase center position.

show abstract

The phase center of horn antennas

Cited by 100 publications

References 2 publications

Numerical Simulation of Far-Field Gain Determination at Reduced Distances Using Phase Center

Numerical Simulation of Far-Field Gain Determination at Reduced Distances Using Phase Center

Reflection Reduction Through Modal Filtering for Integrated Antenna Measurements Above 100 GHz

Determination of the phase center position and delay of a Vivaldi antenna

Contact Info

Product

Resources

About