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An X-band radial power combiner based on an airline coax with 0.15 dB measured insertion loss, 8 dB minimum port-to-port isolation, 33% bandwidth, and the ability to handle kilowatt power levels is presented in this work. The design can readily be scaled to arbitrary frequencies or any number of ports. The methods used to select the parameters and optimize the design are presented. The models are...
The use of heat exchangers to harness microwave energy has great potential in transmitting and collecting beamed energy through space. We consider a simple three-layer laminate model in which a middle layer characterized by a temperature-dependent loss factor is surrounded by two lossless dielectric layers. It is shown that when plane waves symmetrically impinge the laminate at normal incidence conditions...
A simple analytical representation supported with equivalent circuit modeling is presented for a nonradiative dielectric coupler. A matrix form for the dispersion relation and the field coefficients is introduced for simplicity. The design methodology and miniaturization of such couplers using two vertical mirror conducting planes is studied. The new image-nonradiative dielectric coupler is 50% smaller...
A novel approach to modeling the scattered field of a periodic corrugated cylinder, from an oblique incident plane wave, is presented. The approach utilizes radial waveguide approximations for fields within the corrugations, which are point matched to approximated scattered fields outside of the corrugation to solve for the expansion coefficients. The point matching is done with TMz and TEz modes...
Spherical cavities are of high interest for applications because they have a high g-factor, can be easily produced and are the only form of cavities which can be analyzed exactly including dielectric and conductive losses. Electromagnetic fields and modes in a spherical cavity with a dielectric and/or conducting sphere as an inset are analyzed and discussed. The influence of dielectric losses and...
A new method is proposed for tunable negative group delay (NGD) circuit in this paper. The tuner is based on a transmission line resonator loaded on a λ/4 stub, and a lumped resistor and two varactors are mounted on it. By properly biasing the two varactors, the susceptance slope parameter and unloaded Q-factor are significantly tuned while the resonant frequency and input admittance are almost unchanged...
In this paper, a simple method to estimate the conductive losses in complementary split ring resonators (CSRRs) is proposed. It is based on the measurement of the transmission coefficient (insertion loss) in an embedded microstrip line with the CSRR under consideration etched in the ground plane, beneath the conductor strip. It is assumed that losses are due to the substrate (dielectric losses) and...
This paper presents a novel self-packaged high quality factor spiral inductor based on substrate integrated suspended line technology. Suspended substrate are hollowed in specific shape for reducing the dielectric substrate loss. Double-sided interconnected stripline is used for diminishing the metal ohmic loss. Simulation and measurement results demonstrate that the double-sided interconnected spiral...
This paper presents a systematic coupling balance technique to enhance signal matches for long traveling N-pair differential signals. The analysis is conducted on 2N lines with closed-form expressions to indicate the three causes of mismatches. Then, a systematic method is presented to address the three factors to realize balanced coupling for signal matches by using twisting schemes. The effectiveness...
A half-mode hexagonal substrate integrated waveguides (HMHSIW) structure with the internal angle of 90 degrees is presented and then applied in realizing a low-profile, dual-band/tri-polarized antenna with three independent ports. Dual-band composite right/left-handed (CRLH) substrate integrated waveguide (SIW) antennas and zeroth order resonator (ZOR) SIW antennas are designed based on the proposed...
This work investigates mode conversion along a longitudinally uniform mode-selective transmission line (MSTL) and demonstrates physical evidence of the mode conversion. Mode conversion of the fundamental mode is observed through examining the field distributions of the MSTL. Characteristic mode conversion frequency is defined based on the distribution properties of the longitudinal magnetic field...
We develop a resin waveguide for microwave power transfer and wireless communication in an automobile harness. Resin waveguides are more lightweight, low-cost, and flexible than conventional waveguides. Our prototype resin waveguide is fabricated from an elastomeric material with a very low dielectric loss by a copper-foil forming process. The low emission and loss of the transmission line are confirmed...
The block diagram of 3D heterogeneous integration using hot-via LNA, silicon interposer, PCB is presented in this paper. Several broadband vertical transitions between up and down are simulated and optimized by EM simulator. The vertical transition works well from DC to 40GHz, the return loss is better than 15 dB; the insertion loss of each single transition is less than 1 dB. The LNA operating at...
The continuous increase of the I/O data rate and frequency of large volume integrated circuits creates significant challenges on the interconnect to the device under test (DUT) printed circuit board test fixture for automated test equipment (ATE). In this paper we will present a blind mating interface for ATE systems based on a 1.85 mm coaxial geometry to achieve a 65 GHz bandwidth guaranteed interconnect...
This paper presents the design, fabrication and evaluation of a novel packaging method for integration of active MMIC at millimeter-wave (MMW) and sub-MMW frequencies. This packaging approach is intended for integration with a micromachined sub-MMW radar system operating at 240 GHz. The concept is based on a peg and socket structure composed of RF transitions and biasing circuitry where the RF and...
This paper presents a novel D-band interconnect implemented in a low-cost embedded Wafer Level Ball Grid Array (eWLB) commercial process. The non-galvanic transition is realized through a slot antenna directly radiating to a standard air filled waveguide. The interconnect achieves low insertion loss and relatively wide bandwidth. The measured average insertion loss is 3 dB across a bandwidth of 22%...
Inkjet-printed RF electronics fabricated on paper and other flexible substrates are introduced as a low-cost solution for the sensor applications. Inkjet printing is an additive process that has enabled various disruptive technologies combining new materials with novel multidisciplinary operation concepts. This paper presents a fully inkjet printed capacitive structure used to provide a differential...
This paper presents the fabrication process of single-crystalline diamond platform used for high power RF components. We report-for the first time to the best of our knowledge-results of a Coplanar Waveguide (CPW) transmission line printed on the single-crystalline diamond substrate using the Aerosol Jet Printing technique. The transmission line is 2.44 mm long and is printed on the 3.5 mm × 3.5 mm...
We present a novel fully printed, conformai phased array antenna with beam forming capability. Analog phase shifters with a left handed transmission line (LHTL) design are used at the feed lines of four patch subarrays. The microstrip LHTL phase shifter is made of series tunable capacitors and shunt inductive stubs. The voltage-variable capacitor (varactor) is an interdigitated capacitor (IDC) filled...
Combination of lego-like tuning post cavity structure and 3-D Polyjet printing is utilized to demonstrate a high Q X-band resonator for the first time. The dominant mode is TEioi mode with the resonant frequency of 8.31 GHz. The Polyjet printing techniques is one of the state-of-art additive manufacturing technologies, as it allows for high resolution modeling, fast and low cost prototyping. Here...
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