Results 51 to 60 of about 159 (128)

Development and Evaluation of a Software-Defined Radio-Based RFI Meter [PDF]

open access: yes
La exploración del universo a través de radiotelescopios ha ampliado significativamente nuestro conocimiento, permitiendo el estudio de fenómenos astronómicos distantes mediante la captura y análisis de ondas de radio.
Gómez Bernal, Daniel Felipe
core   +1 more source

Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation. [PDF]

open access: yesMicromachines (Basel), 2023
Zhang H   +5 more
europepmc   +1 more source

An Analysis Of The Impedance Of Two Types Of Electric Antennas Designed For Undersea Applications. [PDF]

open access: yes, 1966
The problem of radio wave propagation using antennas submerged in sea water has received much attention in recent years. As early as 1940 Norgorden [1] prepared a paper on the problem of propagation of radio waves from a transmitting antenna in air to a ...
Chavez, Vincent R.
core  

Ultrawideband Antennas: Growth and Evolution. [PDF]

open access: yesMicromachines (Basel), 2021
Kumar OP   +4 more
europepmc   +1 more source

Application of Hybrid Antennas in Normalized Site Attenuation Measurements and An Improved Method for Free-space Antenna Factor Measurement [PDF]

open access: yes, 2010
This thesis first discusses the ground plane effects of a test site on the antenna factors (AFs) of hybrid antenna (biconical log-periodic dipole array). Meanwhile, the effects of mutual coupling between antenna and its image, and the variation of active
Chen, Hsing-Feng
core  

Pemodelan dan Rancang Bangun Antena Bikonikal untuk WiMax Wilayah Frekuensi 3400 – 3600 Mhz (DESIGN AND MODELING BICONICAL ANTENNA FOR WIMAX IN RANGE FREQUENCIES 3400 – 3600 MHZ) [PDF]

open access: yes, 2007
ABSTRAKSI: Standar 802.16 dikembangkan oleh Institute of Electrical and Electronics Engineers (IEEE), yang disebut WirelessMANTM, memberikan perspektif baru dalam mengakses internet dengan kecepatan tinggi tanpa tergantung pada jaringan kabel atau modem.
AGUSTIAN SETYA DANARKO
core  

Ultra-Wideband Antennas for Biomedical Imaging Applications: A Survey. [PDF]

open access: yesSensors (Basel), 2022
Rafique U   +4 more
europepmc   +1 more source

Design and Implementation of Access Point Antenna for Wireless LAN [PDF]

open access: yes, 2007
本論文主要敘述無線區域網路(WLAN)所使用的無線基地台(Access Point)天線,包括圓盤錐形天線、印刷式偶極陣列天線的設計、模擬和量測,以及寬頻三角形Patch天線。在圓盤錐形天線中,透過對各個參數的分析,找出每個參數對天線增益、頻寬的相關性。在共用型饋入偶級陣列天線設計中,先設計出單一個偶極陣列天線,在對偶極天線間的間距做設計,而饋入的機制為四分之一波長轉換的共用型饋入。而串接型偶極陣列天線設計理論同承上述的共用型饋入偶級陣列天線,不同的是饋入的機制為四分之一波長轉換的串接型饋入 ...
朱順發, Ju, Shuen-Fa
core  

Medical Antennas for Microwave Radiothermometry of Biological Objects. [PDF]

open access: yesBiomed Eng (NY), 2023
Sedankin MK   +8 more
europepmc   +1 more source

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