In this letter, a wideband high-gain dielectric lens integrated with a tapered rod antenna using a perforated H-guide is presented for the W-band [(75 to 110) GHz] applications. The designed antenna is fed through a rectangular waveguide WR-10. The antenna can be divided into three sections: metallic housing, perforated H-guided-based tapered dielectric sections, and extended hemisphere dielectric lens. The tapered dielectric section has three parts: tapered feed, perforated H-guide, and radiating tapered end. Further, to enhance the gain, an extended hemisphere dielectric lens is integrated with the radiating tapered end. The proposed antenna shows endfire radiation characteristics with a substantial gain of around 23.9 dBi and excellent cross-polarization (x-pol) levels in both the E- and H-planes. The mechanical stability, wide impedance bandwidth, better radiation efficiency, and high gain of the designed antenna make it a suitable candidate for W-band applications.

In this paper, we designed and analysed the broadside coupled H guide based directional coupler for the Sub-THz frequency range. The designed broadside directional coupler is fabricated using the Form Lab SLA (stereolithography) based 3D printer. In this technique, Grey resin material is used which acts as a polymer material. To excite the LSM mode firstly we designed the broadband transition from rectangular waveguide to H-guide which is fed by the rectangular waveguide WR-2.8. The even and odd mode properties of the broadside coupled H-guide have been studied. The proposed broadside coupler has a 24dB coupling at a frequency of 330GHz. To enhance the mechanical stability we introduced the bridge between the broadside coupled guides. In addition to the bridge and altering the gap between the waveguide, the coupling is varied with respect to the frequency.

In the proposed structure, we designed the InP-based hybrid plasmonic patch nanoantenna at the optical wavelength of 1550. InP-based hybrid plasmonic nanoantenna is one of the alternative approaches of silicon on insulator-based hybrid plasmonic nanoantenna. This optical nanoantenna is used to transmit and receive optical signals. This proposed nanoantenna achieved a gain of 6.78dB at a frequency of 193.4THz. We achieved the reflection coefficient -15dB at 1550nm (193.4THz). At optical communication wavelengths, the InP based HP nanoantenna can be monolithically integrated with a laser and a photodetector.

This paper reports design and analysis of edge coupled H-guide based directional coupler. It is proposed to fabricate the designed coupler using Form lab 3D stereo lithography (SLA) printer where gray resin will be used as polymer material. Dispersion characteristics of the H. guide in the frequency range of 250 GHz - 400GHz have been obtained using CST Microwave studio. A broadband transition has also been designed to excite LSM mode of H-guide using rectangular waveguide. Edge coupled H-guide has been analyzed to obtain even and odd mode characteristics. The designed coupler has 11.7 dB coupling at 330 GHz. The geometry of edge coupled H guide has been modified by introducing a bridge between them to enhance mechanical stability. The presence of bridge alters coupling with frequency.

In this we designed microstrip to NRD(Non-Radiative Dielectric) transition is designed using 3d printing technology. In the proposed structure Polylactic Acid (PLA) used in 3D printing as a dielectric medium in (NRD). NRD to microstrip transition is designed, simulated and physically realized around 47 GHz. Here simulation has been carried out by using HFSS 17. The advantage and shortcomings of PLA made using additive printing technology like 3D printing is discussed in detail. In the result section, we observed the value of S 11 and S 21 and compare the simulated and fabricated results.

This paper uses Polylactic Acid (PLA) used in 3D printing as a dielectric medium in Non-Radioactive Dielectric waveguide (NRD). Front-end circuits like 1 st order and 3 rd order filter were designed and simulated with NRD to waveguide transition using horn antenna at 47 GHz. The simulations have been done using HFSS 17.1. The advantage and shortcomings of PLA made using additive printing technology like 3D printing is discussed in detail.

We proposed a novel type Hybrid Plasmonic optical triangle Nanoantenna with a structure of silicon of insulator. This Nanoantenna is designed for optical telecommunication wavelength of 1550, 1310 nm. It provides the wide optical frequency range from 175 to 244 THz and it can be used for broadband Nanophotonics application. The 10dB bandwidth of the proposed antenna is more than 68 THz. Here simulation is done by CST studio software using a finite element method. The proposed Nanoantenna has satisfactorily gained 7.792, 5.667 dB and reflection ratio -12.86 and -13.56 dB at an optical telecommunication wavelength of 1550, 1310 nm respectively.