Terahertz Antennas and Feeds

Chattopadhyay, Goutam; Alonso‐delPino, Maria; Ovejero, David González; Lee, Choonsup; Reck, Theodore

doi:10.1007/978-3-319-62773-1_10

Cited by 7 publications

(5 citation statements)

References 73 publications

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“…Therefore, we can apply the antenna's feeding using multiple methods that offer impedance variation through various parameters. For example, the sub-millimeter wave antenna feeding using a diagonal horn structure can be one of the methods to feed these types of antennas [37,38]. With its wide and thin walls running along the diagonals of the cross section of the pyramid, this feeder antenna has a horned section with a flared pyramid top.…”

Section: Resultsmentioning

confidence: 99%

“…With its wide and thin walls running along the diagonals of the cross section of the pyramid, this feeder antenna has a horned section with a flared pyramid top. A second method for designing the mm-wave feeding uses a platelet conical corrugated structure [38,39]. Figure 12 shows the variation in S parameters by considering all-port excitation.…”

Section: Resultsmentioning

confidence: 99%

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Ultra-Wideband Graphene-Based Micro-Sized Circular Patch-Shaped Yagi-like MIMO Antenna for Terahertz Wireless Communication

Alharbi

Sorathiya

2022

Electronics

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In this work, an ultra-wideband graphene-based micro-sized circular patch-shaped Yagi-like MIMO antenna was investigated over 1–30 THz of the frequency spectrum. The proposed antenna structure was designed over a polyimide substrate with 620 × 800 µm2. This antenna was radiated over three bands over 1–30 THz. The maximum bandwidth achieved 10.96 THz, with −26 dB of the return loss isolation. These three bands were also mathematically analyzed using various MIMO antenna parameters to match the MIMO antenna criteria. This antenna provided all the accepted results as per the limits set by these antenna parameters. The effect of the different port excitation on the change of directivity of the overall structure is also reported. The MIMO antenna parameters such as TARC (Total Active Reflection Coefficient), ECC (Envelope Correlation Coefficient), MEG (Mean Effective Gain), CCL (Channel Capacity Loss), and DG (Directivity Gain) were investigated for the proposed structure. These values were also identified to check the compatibility and challenges associated with short-distance communication. The suggested THz MIMO antenna provides the operating bands of 1–10 THz and 15–30 THz, with good isolation values. An average of 7 dB gain was observed in the 2 × 2 antenna structure. The newly developed MIMO antenna in the THz frequency range may be used for high-speed short-distance and terahertz communications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Ultra-Wideband Graphene-Based Micro-Sized Circular Patch-Shaped Yagi-like MIMO Antenna for Terahertz Wireless Communication

Alharbi

Sorathiya

2022

Electronics

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“…Computer numerical control (CNC) milling [8]- [9], deep reactive ion etching (DRIE) [10]- [12] or diffusion bonding [13] are rising technologies to manufacture structures based on hollow waveguides that maximize the radiation efficiency [14]. However, such solutions may lead to costly and bulky systems.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost and Low-Profile Sub-Terahertz Luneburg Lens Beamformer on Polymer

Mahmoud

Ruiz‐García

Sagazan

et al. 2023

Antennas Wirel. Propag. Lett.

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Luneburg lens is used to excite a leaky-wave antenna (array of slots) in the sub-terahertz (sub-THz) frequency range. The antenna is built on a 140-µm thick Cyclic Olefin Copolymer (COC) substrate. The radiating slots (58×24 slots) are etched on the polymer by a photolithographic process, for which the gold (Au) layers are first deposited by evaporation on the COC and, then, patterned by chemical etching. No metalized vias or drilling are applied to the substrate. The full system is fed by a standard WR03 waveguide, and it has been fabricated and tested. Experimental results show an input reflection coefficient better than −7 dB over a 25% fractional bandwidth, spanning from 220 GHz to 290 GHz. The radiated beam can be steered in elevation from −80 ° to −20 ° over the same band. The antenna efficiency is estimated to be 20% at the center frequency (260 GHz). This solution provides a simple alternative for low-cost and low-profile beam scanning antennas in the sub-THz range.

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“…The design procedure is based on an ad-hoc mode-matching framework. Such horns are broadband, low-dispersive, do not require dielectrics or focusing elements to generate X-waves, and are scalable to any frequency range, making them particularly suited to millimeter and sub-millimeter wave applications [42] The paper is organized as follows: Sections II and III present, respectively, the numerical formulation and the practical implementation of the proposed technique. Section IV presents an example of a transvere electric (T E) X-wave launcher with 44% FBW and 5 • dispersion of the axicon angle generated by the proposed method.…”

Section: Introductionmentioning

confidence: 99%