Modelling of an Inverted Discone Antenna on an Infinite Soil Plane for Radio Astronomy
2024 International Symposium on Antennas and Propagation (ISAP)（2024）
CSIRO
Abstract
The Cosmic Dawn epoch marks a pivotal phase in the evolution of the early universe. A frequency-independent antenna is required to avoid confusion of the weak radio signal of neutral hydrogen in the early universe from foregrounds that are at least 50 dB stronger. This paper models two inverted discone antennas placed on the ground as candidates for this purpose. To avoid edge effects of a metallic ground plane, the antenna needs to be modelled on dielectric. The antennas are modelled on soil from 40 MHz to 120 MHz and the effects of integrating a receiver directly into the disk section are investigated. We explore these as potential candidates to detect the global imprint of redshifted hydrogen on the cosmic microwave background.
MoreTranslated text
Key words
Frequency independent antenna,Integrated receiver,Ground effect,Radio astronomy
求助PDF
上传PDF
View via Publisher
AI Read Science
AI Summary
AI Summary is the key point extracted automatically understanding the full text of the paper, including the background, methods, results, conclusions, icons and other key content, so that you can get the outline of the paper at a glance.
Example
Background
Key content
Introduction
Methods
Results
Related work
Fund
Key content
- Pretraining has recently greatly promoted the development of natural language processing (NLP)
- We show that M6 outperforms the baselines in multimodal downstream tasks, and the large M6 with 10 parameters can reach a better performance
- We propose a method called M6 that is able to process information of multiple modalities and perform both single-modal and cross-modal understanding and generation
- The model is scaled to large model with 10 billion parameters with sophisticated deployment, and the 10 -parameter M6-large is the largest pretrained model in Chinese
- Experimental results show that our proposed M6 outperforms the baseline in a number of downstream tasks concerning both single modality and multiple modalities We will continue the pretraining of extremely large models by increasing data to explore the limit of its performance
Upload PDF to Generate Summary
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Data Disclaimer
The page data are from open Internet sources, cooperative publishers and automatic analysis results through AI technology. We do not make any commitments and guarantees for the validity, accuracy, correctness, reliability, completeness and timeliness of the page data. If you have any questions, please contact us by email: report@aminer.cn
Chat Paper
Summary is being generated by the instructions you defined