Pith Number

pith:XKCBDF3S

pith:2026:XKCBDF3SEYHOLV7ICVAZCGZDDP

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Multiport Antenna Q-factor

Lukas Jelinek, Miloslav Capek, Vojtech Neuman

A generalized Q-factor estimates multiport antenna bandwidth from single-frequency port data.

arxiv:2605.12564 v1 · 2026-05-12 · eess.SP · cs.IT · math.IT

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Claims

C1strongest claim

The explicit derivation is based on converting the stored energy matrix to its port equivalent and on the port parameters themselves. Derived formulas are shown to utilize the total active reflection coefficient and allow for a single-frequency bandwidth evaluation.

C2weakest assumption

That converting the stored energy matrix to an equivalent port form preserves the bandwidth information accurately for arbitrary feeding and matching networks.

C3one line summary

A multiport Q-factor generalization converts stored energy to port parameters and uses total active reflection coefficient for single-frequency bandwidth estimation in antenna arrays.

References

63 extracted · 63 resolved · 0 Pith anchors

[1] C. A. Balanis,Antenna Theory: Analysis and Design, 2nd ed. Wiley, 1996 1996

[2] A. F. Molisch,Wireless Communications, 2nd ed. Wiley, 2011 2011

[3] J. V olakis, C. C. Chen, and K. Fujimoto,Small Antennas: Miniaturiza- tion Techniques and Applications, 1st ed., W. C. Chew, M. S. Tong, and B. Hu, Eds. McGraw-Hill Professional, 2010 2010

[4] Fundamentals of antenna bandwidth and quality factor, 2025

[5] Q-bounded max- imum directivity of self-resonant antennas, 2023

Formal links

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Receipt and verification

First computed	2026-05-18T03:10:01.906487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba84119772260ee5d7e81541911b231bc068ae111acb9922f2d573355031d44a

Aliases

arxiv: 2605.12564 · arxiv_version: 2605.12564v1 · doi: 10.48550/arxiv.2605.12564 · pith_short_12: XKCBDF3SEYHO · pith_short_16: XKCBDF3SEYHOLV7I · pith_short_8: XKCBDF3S

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curl -sH 'Accept: application/ld+json' https://pith.science/pith/XKCBDF3SEYHOLV7ICVAZCGZDDP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: ba84119772260ee5d7e81541911b231bc068ae111acb9922f2d573355031d44a

Canonical record JSON

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    "abstract_canon_sha256": "170efe7f0b22e1073a0ea6b8ba2f97d4a2e947d3be04b94e92483d10201fbd5b",
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      "cs.IT",
      "math.IT"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2026-05-12T07:46:21Z",
    "title_canon_sha256": "50b33f2815a27e158211de95038da2971efd5d9cc241b35d832ee18697ce2136"
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  "source": {
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    "kind": "arxiv",
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