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The radio-wavelength detection of extensive air showers (EAS) initiated by cosmic-ray interactions in the Earth's atmosphere is a promising technique for investigating the origin of these particles and the physics of their interactions. The…

Instrumentation and Methods for Astrophysics · Physics 2021-03-29 A. Williamson , C. W. James , S. J. Tingay , S. J. McSweeney , S. M. Ord

An analog, low-profile and shielded spectrum analyzer is proposed for operation at mm-wave frequencies around the 60 GHz band based on a novel side-fire Leaky-Wave Antenna (LWA) configuration. The proposed side-fire periodic LWA is…

Applied Physics · Physics 2021-09-15 Daniel J. King , Mohamed K. Emara , Shulabh Gupta

The Karl G. Jansky Very Large Array (VLA) is currently the world's most powerful cm-wavelength telescope. However, within a few years this blanket statement will no longer be entirely true, due to the emergence of a new breed of pre-SKA…

Instrumentation and Methods for Astrophysics · Physics 2013-12-18 Christopher A. Hales

We have used the Very Large Array(VLA) in C configuration to carry out a sensitive 20cm radio survey of regions of sky that have been surveyed in the Far Infra-Red over the wavelength range 5-200 microns with ISO as part of the European…

The East Asian VLBI Network (EAVN) is an international VLBI facility in East Asia and is operated under mutual collaboration between East Asian countries, as well as part of Southeast Asian and European countries. EAVN currently consists of…

Instrumentation and Methods for Astrophysics · Physics 2022-12-15 Kazunori Akiyama , Juan-Carlos Algaba , Tao An , Keiichi Asada , Kitiyanee Asanok , Do-Young Byun , Thanapol Chanapote , Wen Chen , Zhong Chen , Xiaopeng Cheng , James O. Chibueze , Ilje Cho , Se-Hyung Cho , Hyun-Soo Chung , Lang Cui , Yuzhu Cui , Akihiro Doi , Jian Dong , Kenta Fujisawa , Wei Gou , Wen Guo , Kazuhiro Hada , Yoshiaki Hagiwara , Tomoya Hirota , Jeffrey A. Hodgson , Mareki Honma , Hiroshi Imai , Phrudth Jaroenjittichai , Wu Jiang , Yongbin Jiang , Yongchen Jiang , Takaaki Jike , Dong-Kyu Jung , Taehyun Jung , Noriyuki Kawaguchi , Dong-Jin Kim , Hyo-Ryoung Kim , Jaeheon Kim , Jeong-Sook Kim , Kee-Tae Kim , Soon-Wook Kim , Motoki Kino , Hideyuki Kobayashi , Shoko Koyama , Busaba H. Kramer , Jee-Won Lee , Jeong Ae Lee , Sang-Sung Lee , Sang Won Lee , Bin Li , Guanghui Li , Xiaofei Li , Zhixuan Li , Qinghui Liu , Xiang Liu , Ru-Sen Lu , Kazuhito Motogi , Masanori Nakamura , Kotaro Niinuma , Chungsik Oh , Hongjong Oh , Junghwan Oh , Se-Jin Oh , Tomoaki Oyama , Jongho Park , Saran Poshyachinda , Hyunwook Ro , Duk-Gyoo Roh , Wiphu Rujopakarn , Nobuyuki Sakai , Satoko Sawada-Satoh , Zhi-Qiang Shen , Katsunori M. Shibata , Bong Won Sohn , Boonrucksar Soonthornthum , Koichiro Sugiyama , Yunxia Sun , Mieko Takamura , Yoshihiro Tanabe , Fumie Tazaki , Sascha Trippe , Kiyoaki Wajima , Jinqing Wang , Na Wang , Shiqiang Wang , Xuezheng Wang , Bo Xia , Shuangjing Xu , Hao Yan , Wenjun Yang , Jae-Hwan Yeom , Kunwoo Yi , Sang-Oh Yi , Yoshinori Yonekura , Hasu Yoon , Linfeng Yu , Jianping Yuan , Youngjoo Yun , Bo Zhang , Hua Zhang , Yingkang Zhang , Guang-Yao Zhao , Rongbing Zhao , Weiye Zhong

The Low Frequency Array (LOFAR) is a new generation of electronic radio telescope based on aperture array technology. The telescope is being developed by ASTRON, and currently being rolled out across the Netherlands and other countries in…

Cosmology and Nongalactic Astrophysics · Physics 2009-03-07 M. A. Garrett , H. Rampadarath , E. Lenc , Olaf Wucknitz

The Naval Research Laboratory and the National Radio Astronomy Observatory completed implementation of a low frequency capability on the VLA at 73.8 MHz in 1998. This frequency band offers unprecedented sensitivity (~25 mJy/beam) and…

Extremely large-scale antenna arrays (ELAAs) have emerged as a pivotal technology for addressing the unprecedented performance demands of next-generation wireless communication systems. To enhance their practicality, we propose…

Signal Processing · Electrical Eng. & Systems 2026-01-21 Zhengyu Wang , Tiebin Mi , Gui Zhou , Robert C. Qiu

We present the upGREAT THz heterodyne arrays for far-infrared astronomy. The Low Frequency Array (LFA) is designed to cover the 1.9-2.5 THz range using 2x7-pixel waveguide-based HEB mixer arrays in a dual polarization configuration. The…

The KVN+VERA array is a joint VLBI project of seven VLBI stations spread throughout Korea and Japan. Since the first fringe detection in 2008, the early phase observations of the KVN+VERA have been carried out every several months.…

Instrumentation and Methods for Astrophysics · Physics 2013-10-11 S. Sawada-Satoh

We present the results of the first transient survey from the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) using 31 hr of data, in which we place the most constraining limits on the instantaneous transient surface density…

We have observed 28 sources selected from the 1Jy sample of BL Lac objects (Stickel et al. 1991) with the Very Large Array (VLA) in A, B and D configurations at 1.36, 1.66 and 4.85 GHz, and/or with the Westerbork Synthesis Radio Telescope…

Astrophysics · Physics 2009-10-31 P. Cassaro , C. Stanghellini , M. Bondi , D. Dallacasa , R. Della Ceca , R. A. Zappala`

The Murchison Widefield Array (MWA) is a low frequency radio interferometer designed and developed by an international consortium, operated on behalf of the consortium by Curtin University. The MWA is a Precursor for the low frequency…

Instrumentation and Methods for Astrophysics · Physics 2025-09-11 Steven J. Tingay

The ngVLA is a new interferometric radio astronomy facility with transformative capabilities, being developed by the National Radio Astronomy Observatory. It combines two orders of magnitude in frequency coverage, over 1.2 - 116 GHz, with…

Instrumentation and Methods for Astrophysics · Physics 2025-04-22 T. K. Sridharan , S. Bhatnagar , P. Jagannathan , K. Golap

The low frequency component of the Square Kilometre Array (SKA1-Low) will be an aperture phased array located at the Murchison Radio-astronomy Observatory (MRO) site in Western Australia. It will be composed of 512 stations, each of them…

The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has developed and deployed the hardware and software necessary to coherently sum the signals of individual ALMA antennas and record the aggregate sum in Very Long…

The wide adoption of low-frequency radio interferometers as a tool for deeper and higher resolution astronomical observations has revolutionised radio astronomy. Despite their construction from static, relatively simple dipoles, the sheer…

Instrumentation and Methods for Astrophysics · Physics 2021-02-02 A. Chokshi , J. L. B. Line , N. Barry , D. Ung , D. Kenney , A. McPhail , A. Williams , R. L. Webster