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home | newest check | boards | help index | log | ps | userlogin | send sysop | slog | status forward | bcm news | users | version | remove cookieHP2DFA > TECH 25.10.26 16:25l 46 Lines 1862 Bytes #5 (0) @ WW BID : 5773_HP2DFA Read: GUEST Subj: RESEARCHERS SUCCESSFULLY DEMONSTRATE PLASMA BEAM ANTENNA Path: JH4XSY<IW0QNL<HB9ON<DK0WUE<IW2OHX<K5DAT<VE2PKT<PY2BIL<HP2DFA Sent: 261025/0719Z 5773@HP2DFA.#COL.PAN.CEAM BPQ6.0.24 SCIENTISTS DEMONSTRATE LASER-INDUCED-PLASMA-FILAMENT (LIPF) ANTENNA TRANSMITTING VHF AUTHORS: PRYA DARSHNI & PAUL FRANZON (NC STATE) / ARTHUR DOGARIU DATE: OCTOBER 25, 2026 ISSUED VIA BPQ32 NODE HP2DFA-5 IN PANAMA ================================================== 1. INNOVATION OVERVIEW ================================================== RESEARCHERS AT NORTH CAROLINA STATE UNIVERSITY HAVE SUCCESSFULLY DEMONSTRATED A TECHNIQUE USING A LASER TO PRODUCE A TUNABLE PLASMA BEAM ANTENNA CAPABLE OF TRANSMITTING RADIO WAVES. DESCRIBED AS LOOKING LIKE A "LIGHTSABER," THIS SYSTEM ALLOWS FOR FREQUENCY SWEEPING AND CUSTOMIZED ANTENNA LENGTHS WITHOUT COMPLICATED MECHANICAL DEPLOYMENT MECHANISMS. ================================================== 2. OPERATION & CONTACTLESS FEED ================================================== BY FIRING A LASER BEAM, RESEARCHERS IONIZE A THIN SHAFT OF AIR INTO A PLASMA FILAMENT. TO SOLVE THE CHALLENGE OF CONNECTING RADIO TECHNOLOGY WITHOUT DISTORTING THE PLASMA, THEY DESIGNED A CAPACITIVELY- COUPLED CONTACTLESS FEED USING A METAL RING. FEEDING A 30 MHZ RF SIGNAL INTO THE CAPACITOR INDUCED THE PLASMA FILAMENT TO RADIATE ITS OWN ELECTROMAGNETIC FIELD, YIELDING A 150｢NCREASE IN RECEIVED SIGNAL. ================================================== 3. APPLICATIONS & SPACE EXPLORATION ================================================== THE TECHNIque ENABLES BEAM STEERING, CONTROLLING THE ANTENNA'S ANGLE AND LENGTH BY SHIFTING THE LASER. LONG-TERM PROSPECTS INCLUDE SATELLITES AND LEO SPACE EXPLORATION WHERE PAYLOAD CONSTRAINTS AND WIDE- BAND SCANNING ARE CRITICAL. THE STUDY WAS PUBLISHED IN THE *IEEE JOURNAL OF MICROWAVES* (DOI: 10.1109/JMW.2026.3722433). CREDITS & SOURCES: NC STATE / IEEE JOURNAL OF MICROWAVES / MATT SHIPMAN NODE CONTACT MAIL: HP2DFA@GMAIL.COM / HP2DFA-5@BPQ32 73 DE HP2DFA-5 / BPQ32 NODE PANAMA
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