Receiving‐antenna Kirchhoff‐equivalent circuits and their scattering reciprocity properties

Štumpf, Martin

doi:10.1049/iet-map.2016.0100

Cited by 6 publications

(1 citation statement)

References 23 publications

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“…If the reference receiving antenna from Figure is open circuited, that is,

Z^{normalL} \to \infty

, we get

I^{normalT} (t) *_{_{t}} Δ E_{q}^{normals} (x^{normalB}, t) = - Ĩ^{normalR} (t) *_{_{t}} E_{q}^{normalT} (x^{normalB}, t)

for

x^{normalB} \in {scriptD}^{\infty}

and t > 0, while the short‐circuited reference leads to

I^{normalT} (t) *_{_{t}} Δ E_{q}^{normals} (x^{normalB}, t) = - 1.19em [Ĩ^{normalR} (t) - I^{normalG} (t) 1.19em] *_{_{t}} E_{q}^{normalT} (x^{normalB}, t)

for

x^{normalB} \in {scriptD}^{\infty}

and t > 0, where I G is Norton's short‐circuit current. The real‐FD counterparts of and have been previously applied to discussing the adequacy of Kirchhoff's network representation of a receiving antenna (Collin, , equations (9) and (10); Štumpf, ).…”

Section: Reciprocity Analysismentioning

confidence: 99%

Controlling Pulsed EM Scattering of a One‐Port Receiving Antenna

Štumpf

2017

Radio Science

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A time domain compensation theorem concerning electromagnetic (EM) scattering of a one‐port antenna system is derived with the aid of the reciprocity theorem of the time convolution type. The theorem describes the impact of a change in the antenna load on receiving antenna scattering properties. The compensation theorem is next applied to express the change of the copolarized backscattered far‐field amplitude in terms of (local) Kirchhoff circuit quantities excited in the corresponding receiving scenarios. Applications of the results can be found in controlling the pulsed echo of a receiving antenna as well as in related theoretical aspects of receiving antenna scattering theory. Illustrative numerical results are given for both linear and nonlinear antenna loads.

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“…If the reference receiving antenna from Figure is open circuited, that is,

Z^{normalL} \to \infty

, we get

I^{normalT} (t) *_{_{t}} Δ E_{q}^{normals} (x^{normalB}, t) = - Ĩ^{normalR} (t) *_{_{t}} E_{q}^{normalT} (x^{normalB}, t)

for

x^{normalB} \in {scriptD}^{\infty}

and t > 0, while the short‐circuited reference leads to

I^{normalT} (t) *_{_{t}} Δ E_{q}^{normals} (x^{normalB}, t) = - 1.19em [Ĩ^{normalR} (t) - I^{normalG} (t) 1.19em] *_{_{t}} E_{q}^{normalT} (x^{normalB}, t)

for

x^{normalB} \in {scriptD}^{\infty}

Section: Reciprocity Analysismentioning

confidence: 99%

Controlling Pulsed EM Scattering of a One‐Port Receiving Antenna

Štumpf

2017

Radio Science

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References

2017

Electromagnetic Reciprocity in Antenna Theory

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Solution of electromagnetic scattering field of adjacent transmission towers based on reciprocity theorem

Tang,

Zhang,

Shang

et al. 2024

Journal of Applied Physics

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Due to the large number of transmission towers being built, the dense distribution of transmission towers is inevitable in some areas. Densely distributed transmission towers will generate severe electromagnetic coupling, which will affect the setting of the passive interference protection distance between transmission towers and adjacent radio stations. Therefore, based on the traditional algorithm for solving the electromagnetic scattering field of a single electrically large target in wide area space, the electromagnetic coupling effect between multiple adjacent transmission towers within a range of 10 times the signal wavelength was considered. Based on the reciprocity relationship between the scattering electric field and the source and the introduced auxiliary field source as the intermediate variable, the electric field integral equation of the secondary scattering field generated by the electromagnetic coupling effect of adjacent transmission towers was derived, and the secondary scattering field is superimposed with the primary scattering field of the transmission generated by the electromagnetic wave excitation of the radio station, obtaining the electromagnetic scattering field at any point. In order to verify the accuracy of the algorithm proposed in this article, the scaled model experiments for the electromagnetic coupling effect between two transmission towers in an anechoic chamber were conducted. The average error of the algorithm proposed in this article is 6.73%, while the error of traditional algorithms is 20.18%. Compared with the traditional algorithm, the accuracy of the proposed algorithm is improved by 13.45%.

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Receiving‐antenna Kirchhoff‐equivalent circuits and their scattering reciprocity properties

Cited by 6 publications

References 23 publications

Controlling Pulsed EM Scattering of a One‐Port Receiving Antenna

Controlling Pulsed EM Scattering of a One‐Port Receiving Antenna

References

Solution of electromagnetic scattering field of adjacent transmission towers based on reciprocity theorem

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