EP0715369A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

A multiband antenna system

Assignee: Indian Space Research Organisation

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Filing: 1994-12-01

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Granted: —

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Expires: 2014-12-01

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Abstract

Abstract There is described a multiband antenna system for operating at L-band, S-band and UHF-band comprising L-band antenna elements (1) and S-band antenna elements (2) provided in the form of quadrifilar helices spaced from each other on the surface of a hollow cylindrical insulator (4); UHF band antenna elements (3) provided in the form of a cage dipole on the surface of the said hollow cylindrical insulator (4); the L-band antenna input being connected to a first connector (5) through an L-band feed network card (8); the S-band antenna input being connected to a second connector (6) through an S-band feed network card (9) and the UHF-band antenna input being connected to a third connector (7) through a split sheath balun (10) provided along the axis of the said hollow cylindrical insulator (4).

Inventors

👤 Surendra Dr. Pal
👤 Vodralli Keshavamurthy Laskshmeesha
👤 Vaidyanathan Mahadevan
👤 Sadananden
👤 Manickam Kumar
👤 Venkatagri Subrahmanya
👤 Thammaiahappa Mallikarjunaiah
👤 Lourdnathan Nicholas
👤 Subramaniam Aswathnarayan
👤 Mallavalli Lakshminarayana Subramanya
👤 Changantidurga Venkata Subramanyam

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-01 20:54

CPC Classifications

H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08; H01Q5/00; H01Q5/40

Claims Analysis

Total Claims: 3

Claim 1

Independent Claim 129 words

A multiband antenna system for operating at L-band, S-band and UHF-band comprising L-band antenna elements (1) and S-band antenna elements (2) provided in the form of quadrifilar helices spaced from each other on the surface of a hollow cylindrical insulator (4); UHF band antenna elements (3) provided in the form of a cage dipole on the surface of the said hollow cylindrical insulator (4); the L-band antenna input being connected to a first connector (5) through an L-band feed network card (8); the S-band antenna input being connected to a second connector (6) through an S-band feed network card (9) and the UHF-band antenna input being connected to a third connector (7) through a split sheath balun (10) provided along the axis of the said hollow cylindrical insulator (4).

Claim 2

Dependent Claim 24 words

The multiband antenna system as claimed in claim 1 wherein the said antenna elements and the said feed networks are enclosed in a radome.

Claim 3

Dependent Claim 33 words

The multiband antenna system as claimed in claim 1 wherein the L-band, S-band and UHF-band antenna inputs are connected to first, second and third connectors respectively by means of semi rigid coaxial cables.

References Cited (Backward Citations)

DE3017169A1 Cited

FR2570546A1 Cited

EP0427654A1 Cited

JPH04134906A Cited

FR2667988A1 Cited

US5138331A Cited

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