Chinese scientists have successfully transmitted high-definition video signals over kilometers using terahertz wireless communication technology, marking the world's first case to apply superconducting terahertz receivers to long-distance wireless communication systems.
Terahertz waves refer to electromagnetic waves with wavelengths between 3,000 and 30 micrometers, sitting between microwaves and optical infrared frequencies. Research into the terahertz range deepens the understanding of fundamental scientific questions in physics, astronomy, and information science. Applications for terahertz technology span various fields, including astronomical observation, biomedical science, and data transmission, with significant implications for cutting-edge research, national economic development, and security.
The experiment was carried out from Sept 27 to Oct 1 at the submillimeter-wave astronomical observation base at an altitude of over 4,000 meters located on the Qinghai-Xizang Plateau. Researchers from the Purple Mountain Observatory under Chinese Academy of Sciences led the experiment with other teams.
"For example, if we see microwave communication as a two-lane road, then terahertz communication, due to its broader and richer spectrum resources, is like expanding that road to six or eight lanes. The significance of the superconducting detection technology we used this time lies in its high sensitivity. It's like having better-performing cars on this wider road, with almost no energy loss, allowing the signals to travel much farther," said Li Jing, researcher at the Purple Mountain Observatory.
This experiment has fully demonstrated the unique advantages of using superconducting receivers in terahertz communication, laying critical technical foundation for future space and air-to-ground high-capacity terahertz communication, as well as the construction of a multi-disciplinary platform at the submillimeter-wave observatory.
Chinese scientists achieve breakthrough in long-distance terahertz wireless communication
Chinese scientists achieve breakthrough in long-distance terahertz wireless communication
Hezbollah leader Naim Qassem said Sunday that any Israeli military presence on Lebanese territory is unacceptable, stressing that the Lebanese army is the "only party authorized to protect national sovereignty."
"There is no place for security zones or Israeli military positions inside Lebanon," Qassem said in a televised speech on al-Manar local TV channel.
He accused Israel of attempting to redefine the Nov. 27, 2024 ceasefire by maintaining freedom of military action inside Lebanon while demanding full compliance from Hezbollah.
He said any future understanding must be based on a complete halt to Israeli attacks, full withdrawal of Israeli forces, and deployment of the Lebanese army south of the Litani River.
Hezbollah remains committed to any comprehensive ceasefire but will not accept continued "Israeli violations," he said.
Qassem also said the United States can compel Israel to stop its attacks if it chooses to do so, adding that U.S. support has enabled Israel to continue its military operations.
On Sunday, Israeli Prime Minister Benjamin Netanyahu said that the Israeli military will continue its long-term presence in the so-called "security zone" in southern Lebanon, based on security needs, until the security threat to Israel is eliminated.
Israeli Defense Minister Israel Katz also said on Sunday that the Israeli army will not withdraw from the "security zone" it holds in southern Lebanon, despite a recent ceasefire announcement.
Katz affirmed in a statement that the Israeli military would remain at all positions in the "security zone," which he claimed protects northern Israeli settlements.
He added that there was and is no restriction on Israeli soldiers in Lebanon to act to eliminate threats.
Israel's military chief Eyal Zamir said Sunday that the ceasefire declared in Lebanon the day before is "fragile," according to a statement from the Israel Defense Forces (IDF).
Speaking during a situation assessment with senior commanders of units operating in southern Lebanon, Zamir stated that the military must maintain a high level of readiness for the renewal of combat operations, and the elimination of threats.
He added that the Israeli military continues to fight, and that its goal remains to protect communities in northern Israel.
The cumulative death toll from Israeli attacks on Lebanon since March 2 had risen to 4,057, with 12,121 people wounded, the Lebanese Health Ministry's Public Health Emergency Operations Center said Saturday.
Hezbollah chief says any Israeli military presence in Lebanon unacceptable
Hezbollah chief says any Israeli military presence in Lebanon unacceptable
