# US 10,770,774 B2 · Microstrip-waveguide transition for transmitting electromagnetic wave signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,774 B2 - Document ID: US10770774B2 - Status: Granted - Kind: B2 - Application number: 16/145,622 - Filed: 2018-09-28 - Published: 2019-04-04 - Granted: 2020-09-08 - Earliest claimed: 2016-03-28 - Assignees: Korea Advanced Institute of Science and Technology - Applicants: Korea Advanced Institute of Science and Technology - Inventors: Hyeon Min Bae; Ha Il Song; Joon Yeong Lee; Tae Hoon Yoon; Hyo Sup Won - Web page: https://patentgrep.com/patent/US10770774B2 ## CPC - H01P 1/2138: {using hollow waveguide filters (H01P1/2131 takes precedence)} - H01P 3/081: {Microstriplines} - H01P 3/10: Wire waveguides, i.e. with a single solid longitudinal conductor - H01P 3/12: Hollow waveguides (H01P3/20 takes precedence) - H01P 3/122: {Dielectric loaded (not air)} - H01P 3/16: Dielectric waveguides, i.e. without a longitudinal conductor - H01P 3/165: {Non-radiating dielectric waveguides} - H01P 5/02: with invariable factor of coupling (H01P5/12 takes precedence {choke joints H01P1/04, H01P1/06}) - H01P 5/08: for linking dissimilar lines or devices (H01P1/16, H01P5/04 take precedence; linking lines of the same kind but with different dimensions H01P5/02) - H01P 5/087: {Transitions to a dielectric waveguide} - H01Q 9/0407: {Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40)} - H01Q 9/045: {with particular feeding means (for circular polarisation H01Q9/0428)} - H01Q 13/06: Waveguide mouths (horns H01Q13/02) - H04L 12/40052: {High-speed IEEE 1394 serial bus (bus transfer protocol on a daisy chain bus using an embedded synchronisation G06F13/426)} - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention relates to a microstrip-waveguide transition for transmission of electromagnetic wave signals. According to one aspect of the invention, there is provided a microstrip-waveguide transition for transmission of electromagnetic wave signals, comprising: a feeding part for providing an electromagnetic wave signal to be transmitted through the waveguide; and a ground part formed at a predetermined interval from the feeding part, wherein the microstrip and the waveguide are coupled alongside each other along a length direction of the waveguide, and wherein a distance between the feeding part and the ground part in a direction perpendicular to the length direction of the waveguide is greater as it is closer to the waveguide. ## Claims ### Claim 1 A microstrip-waveguide transition for transmission of electromagnetic wave signals, comprising: a feeding part for providing an electromagnetic wave signal to be transmitted through the waveguide; and a ground part formed at a predetermined interval from the feeding part, wherein the microstrip and the waveguide are coupled alongside each other along a length direction of the waveguide, and wherein a distance between the feeding part and the ground part in a direction perpendicular to the length direction of the waveguide is greater as it is closer to the waveguide. ### Claim 2 (depends on 1) The microstrip-waveguide transition of claim 1, wherein a distance between the feeding part and the ground part in a direction parallel to or substantially parallel to a width direction of the waveguide is greater as it is closer to the waveguide, and wherein an electromagnetic wave that forms an electric field in a direction parallel to or substantially parallel to the width direction of the waveguide is radiated as the electromagnetic wave signal is propagated along the feeding part. ### Claim 3 (depends on 1) The microstrip-waveguide transition of claim 1, wherein a cross-section of the waveguide has a shape longer in a height direction of the waveguide than in a width direction thereof. ### Claim 4 (depends on 1) The microstrip-waveguide transition of claim 1, further comprising: a substrate, wherein the feeding part is formed above the substrate and the ground part is formed below the substrate. ### Claim 5 (depends on 4) The microstrip-waveguide transition of claim 4, wherein the substrate consists of a dielectric. ### Claim 6 (depends on 4) The microstrip-waveguide transition of claim 4, further comprising: a via array part comprising at least one via formed through at least a part of the substrate along a thickness direction of the substrate and arranged along a length direction of the feeding part or the ground part. ### Claim 7 A microstrip-waveguide transition for transmission of electromagnetic wave signals, comprising: a feeding part for providing an electromagnetic wave signal to be transmitted through the waveguide; a ground part formed at a predetermined interval from the feeding part; and a via part for electrically connecting the feeding part and the ground part along a height direction of the waveguide, wherein the microstrip and the waveguide are coupled alongside each other along a length direction of the waveguide. ### Claim 8 (depends on 7) The microstrip-waveguide transition of claim 7, wherein an electromagnetic wave that forms an electric field in a direction parallel to or substantially parallel to the height direction of the waveguide is radiated as the electromagnetic wave signal is sequentially propagated along the feeding part, the via part, and the ground part. ### Claim 9 (depends on 7) The microstrip-waveguide transition of claim 7, wherein a cross-section of the waveguide has a shape longer in a width direction of the waveguide than in the height direction thereof. ### Claim 10 A microstrip-waveguide transition for transmission of electromagnetic wave signals, comprising: a first substrate; a second substrate disposed below the first substrate; a feeding part formed above the first substrate to provide an electromagnetic wave signal to be transmitted through the waveguide; an intermediate part formed between the first substrate and the second substrate; a ground part formed below the second substrate; a first via part formed through at least a part of the first substrate and the second substrate along a height direction of the waveguide to electrically connect the feeding part and the intermediate part; and a second via part formed through the second substrate along the height direction of the waveguide to electrically connect the intermediate part and the ground part, wherein the microstrip and the waveguide are coupled alongside each other along a length direction of the waveguide. ### Claim 11 (depends on 10) The microstrip-waveguide transition of claim 10, wherein a distance from the waveguide to the first via part is greater than that from the waveguide to the second via part. ### Claim 12 (depends on 10) The microstrip-waveguide transition of claim 10, wherein an electromagnetic wave that forms an electric field in a direction parallel to or substantially parallel to the height direction of the waveguide is radiated as the electromagnetic wave signal is sequentially propagated along the feeding part, the first via part, the intermediate part, the second via part, and the ground part. ### Claim 13 (depends on 10) The microstrip-waveguide transition of claim 10, wherein the first substrate and the second substrate consist of a dielectric. ### Claim 14 (depends on 10) The microstrip-waveguide transition of claim 10, further comprising: a via array part comprising at least one auxiliary via formed through at least a part of the first substrate and the second substrate along a thickness direction of the first substrate or the second substrate and arranged along a length direction of the feeding part, the intermediate part, and the ground part. ### Claim 15 A method for transmission of electromagnetic wave signals, comprising the steps of: generating an electromagnetic wave signal; and propagating the generated electromagnetic wave signal along a feeding part to radiate an electromagnetic wave that forms an electric field in a direction parallel to or substantially parallel to a direction perpendicular to a length direction of a waveguide, wherein a microstrip and the waveguide are coupled alongside each other along the length direction of the waveguide.