Dual-Band Transmitarrays With Dual-Linear Polarization at Ka-Band

2017 ◽  
Vol 65 (12) ◽  
pp. 7009-7018 ◽  
Author(s):  
Kien T. Pham ◽  
Ronan Sauleau ◽  
Erwan Fourn ◽  
Fatimata Diaby ◽  
Antonio Clemente ◽  
...  
Keyword(s):  
Linear Polarization ◽  
Dual Band ◽  
Ka Band

scholarly journals A compact low-noise frontend for interleaved Rx/Tx arrays at K-/Ka-Band

2021 ◽  
pp. 1-7
Author(s):  
Anton Sieganschin ◽  
Thomas Jaschke ◽  
Arne F. Jacob
Keyword(s):  
Insertion Loss ◽  
Printed Circuit Board ◽  
Noise Figure ◽  
Low Noise ◽  
Single Band ◽  
Circuit Board ◽  
Dual Band ◽  
Ka Band ◽  
Compression Properties ◽  
The Individual

Abstract This contribution deals with a frontend for interleaved receive (Rx)-/transmit (Tx)-integrated phased arrays at K-/Ka-band. The circuit is realized in printed circuit board technology and feeds dual-band Rx/Tx- and single-band Tx-antenna elements. The dual-band element feed is composed of a substrate-integrated waveguide (SIW) diplexer with low insertion loss, a low-noise amplifier (LNA), a bandpass filter, and several passive transitions. The compression properties of the LNA are identified through two-tone measurements. The results dictate the maximum allowable output power of the power amplifier. The single band feed consists of a SIW with several transitions. Simulation and measurement results of the individual components are presented. The frontend is assembled and measured. It exhibits an Rx noise figure of 2 dB, a Tx insertion loss of ~ 2.9 dB, and an Rx/Tx-isolation of 70 dB. The setup represents the unit cell of a full array and thus complies with the required half-wave spacing at both Rx and Tx.

scholarly journals Dual-Band Single-Layer Slot Array Antenna Fed by K/Ka-Band Dual-Mode Resonators in Gap Waveguide Technology

2021 ◽  
pp. 1-1
Author(s):  
Miguel Ferrando-Rocher ◽  
Jose Ignacio Herranz-Herruzo ◽  
Alejandro Valero-Nogueira ◽  
Mariano Baquero-Escudero
Keyword(s):  
Single Layer ◽  
Array Antenna ◽  
Dual Band ◽  
Dual Mode ◽  
Ka Band

KuKa altimeter mode data gathered during MOSAiC: scattering from snow covered sea ice and snow depth determination using dual-frequency and polarimetric approaches

2021 ◽  
Author(s):  
Rosemary Willatt ◽  
Julienne Stroeve ◽  
Vishnu Nandan ◽  
Rasmus Tonboe ◽  
Stefan Hendricks ◽  
...  
Keyword(s):  
Sea Ice ◽  
Snow Depth ◽  
Satellite Altimetry ◽  
Field Measurements ◽  
Dual Band ◽  
Altimetry Data ◽  
Dual Frequency ◽  
Sea Ice Thickness ◽  
Ka Band ◽  
Snow And Ice

<p>Retrieving the thickness of sea ice, and its snow cover, on long time- and length-scales is critical for studying climate. Satellite altimetry has provided estimations of sea ice thickness spanning nearly three decades, and more recently altimetry techniques have provided estimations of snow depth, using dual-band satellite altimetry data. These approaches are based on assumptions about the main scattering surfaces of the radiation. The dominant scattering surface is often assumed to be the snow/ice interface at Ku-band frequencies and the air/snow interface at Ka-band and laser frequencies. It has previously been shown that these assumptions do not always hold, but field data to investigate the dominant scattering surfaces and investigate how these relate to the physical snow and ice characteristics were spatially and temporally limited. The MOSAiC expedition provided a unique opportunity to gather data using a newly-developed Ku- and Ka-band radar 'KuKa' deployed over snow-covered sea ice, along with coincident field measurements of snow and ice properties. We present transect data gathered with the instrument looking at nadir to demonstrate how the scattering characteristics vary spatially and temporally in the Ku- and Ka-bands, and discuss implications for interpretation of dual-frequency satellite radar altimetry data. We compare KuKa data with field measurements to demonstrate snow depth retrieval using Ku- and Ka-band data.</p>

Dual-Band Ultrathin Meta-Array for Polarization Conversion in Ku/Ka-Band With Broadband Transmission

2020 ◽  
Vol 19 (5) ◽  
pp. 856-860 ◽  
Author(s):  
Ayesha Kosar Fahad ◽  
Cunjun Ruan ◽  
Rabia Nazir ◽  
Tanveer Ul Haq ◽  
Wenlong He
Keyword(s):  
Dual Band ◽  
Polarization Conversion ◽  
Ka Band

Polarization Reconfigurable Dual-Band Rectangular Slot Antenna

Frequenz ◽  
2019 ◽  
Vol 73 (9-10) ◽  
pp. 339-351
Author(s):  
Rohit Kumar Saini
Keyword(s):  
Circular Polarization ◽  
Linear Polarization ◽  
Dual Band ◽  
Slot Antenna ◽  
Pin Diodes ◽  
Rectangular Slot ◽  
Left Hand ◽  
Right Hand ◽  
Lower Band ◽  
The Senses

Abstract A novel dual-band rectangular slot antenna is presented for dual-sense reconfigurable polarization. A W-shaped microstrip feedline and two rectangular parasitic patches are used to obtain dual-band circular polarization. Further, the feedline is modified so that the senses of polarization at the two bands are opposite. By introducing PIN-diodes in the feed lines, polarization can be switched among left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), and linear polarization (LP). A prototype dual-band dual-sense antenna with f01 = 1.9 GHz and f02 = 3.45 GHz is fabricated in a 1.6 mm thick FR4 substrate. The measured circular polarized bandwidths are more than 7.6 % for the lower band and 5 % for the upper band.

scholarly journals Dual-Band Dual-Linear Polarization Reflectarray for mmWaves/5G Applications

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 78183-78192 ◽  
Author(s):  
Sandra Costanzo ◽  
Francesca Venneri ◽  
Antonio Borgia ◽  
Giuseppe Di Massa
Keyword(s):  
Linear Polarization ◽  
Dual Band

Single-Layer Dual-Band Reflectarray With Single Linear Polarization

2014 ◽  
Vol 62 (1) ◽  
pp. 199-205 ◽  
Author(s):  
Shi-Wei Qu ◽  
Qing-Yong Chen ◽  
Ming-Yao Xia ◽  
Xiu Yin Zhang
Keyword(s):  
Linear Polarization ◽  
Single Layer ◽  
Dual Band
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