July 2017 Project: IEEE P802.15 Working Group for Wireless ......Slide 1 Sebastian Rey, TU...

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Sebastian Rey, TU Braunschweig Slide 1 July 2017 doc.: IEEE 802.15--17-0396-00-0thz Submission Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: A first 300 GHz Phased Array Antenna Date Submitted: 11. July 2017 Source: Sebastian Rey, Technische Universität Braunschweig (TU Braunschweig) Address: Schleinitzstr. 22, 38106 Braunschweig, Germany Voice: +49 531 391 2439, FAX: +49 531 391 5192, E-Mail:[email protected] Re: - Abstract: A concept of a phased array operating at 300 GHz with horn elements and some simulation and measurement results are presented. Purpose: Provide Information to the Interest Group Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

Transcript of July 2017 Project: IEEE P802.15 Working Group for Wireless ......Slide 1 Sebastian Rey, TU...

Page 1: July 2017 Project: IEEE P802.15 Working Group for Wireless ......Slide 1 Sebastian Rey, TU Braunschweig July 2017 doc.: IEEE 802.15--17 -0396 00 0thz Submission Project: IEEE P802.15

Sebastian Rey, TU Braunschweig Slide 1

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: A first 300 GHz Phased Array Antenna

Date Submitted: 11. July 2017

Source: Sebastian Rey, Technische Universität Braunschweig (TU Braunschweig)

Address: Schleinitzstr. 22, 38106 Braunschweig, Germany

Voice: +49 531 391 2439, FAX: +49 531 391 5192, E-Mail:[email protected]

Re: -

Abstract: A concept of a phased array operating at 300 GHz with horn elements and some simulation and

measurement results are presented.

Purpose: Provide Information to the Interest Group

Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for

discussion and is not binding on the contributing individual(s) or organization(s). The material in this

document is subject to change in form and content after further study. The contributor(s) reserve(s) the right

to add, amend or withdraw material contained herein.

Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE

and may be made publicly available by P802.15.

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Sebastian Rey, TU Braunschweig Slide 2

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

A first Phased Array Antenna with horn

elements operating at 300 GHz

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Sebastian Rey, TU Braunschweig Slide 3

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Outline

• TERAPAN Framework

• Phased Array Antenna at 300 GHz

• Performance in Simulations

• Measurement Results

• Summary

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Sebastian Rey, TU Braunschweig Slide 4

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

TERAPAN – SISO-Link

• Collaboration project (University of

Stuttgart, Fraunhofer IAF, TU BS)

• 35nm GaAs mHEMT

• Fully integrated 300 GHz transmitter & receiver MMICs

• Compact high performance waveguide modules

• Successfully demonstrated 64 Gbit/s data transmission with QPSK

(limited by measurement equipment and linearity)

• Link budget

-4.0 dBm transmit power

+24.2 dBi horn antenna gain (Tx)

-88.0 dB free space path loss 2 m

+24.2 dBi horn antenna gain (Rx)

-(-59.2 dB) receiver noise (noise figure

6.7 dB, 64 GHz bandwidth)

= 15.6 dB SNR

AMP x3

I- and Q- Data

300 GHz

Signal

LO

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Sebastian Rey, TU Braunschweig Slide 5

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Constraints and Targets for the Design

• Max. 4 channels

– Max. number of available AWG channels

– Enough for beam steering demonstration

• Standard WR-3 wave guide flange for each element

– Easier characterization of components

– Practical reasons (easy exchange in case of defect, etc)

– Flexibility

• Operational frequency range 275 to 325 GHz

• At least a gain of 20 dBi (whole array), 14 dBi single element

– SISO-link used 24.2 dBi horn antenna

– Transmitter: 20 dBi (array gain) + 6 dB (4 channels with the same power)

• Linear array in one dimension

– Narrower main lobe

– Better steering capabilities than 2x2

• Manufacturability

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Sebastian Rey, TU Braunschweig Slide 6

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Submission

Proposed Antenna

Parameter Size

B 3.0 mm (horn width)

C 1.0 mm (horn height)

D 0.8640 mm (WR3)

E 0.4320 mm (WR3)

F (flare) 3.577 mm

spacing 1.25 mm= C + 0.25 mm

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Sebastian Rey, TU Braunschweig Slide 7

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Simulation Results – Single Element

Single Element • 300 GHz Pattern

• Single (inner) horn

– 14.8 dBi gain

– 50.0° horizontal HPBW (along width)

– 23.6° vertical HPBW (along height)

• Outer elements

– -0.2 dB less gain; Horizontal HPBW

approx. 2° wider

• Average S11 of -25.7 dB; max. -22.7 dB

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Sebastian Rey, TU Braunschweig Slide 8

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Simulated Impedance Matching

• Average S11 of -25.7 dB; max. -22.7 dB

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Sebastian Rey, TU Braunschweig Slide 9

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Submission

Array

Simulation Results – Array

Tilted Array

• 300 GHz Pattern

• Array

– 20.7 dBi gain

– 10.3° horizontal HPBW (along width)

– 23.6° vertical HPBW (along height)

– Grating lobes

• All values for 300 GHz with Time Domain

Solver of CST Microwave Studio

– For 275 GHz 19.9 dBi, 11.3°, 24.9°

– For 325 GHz: 21.4 dBi, 9.5°, 22.3°

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Sebastian Rey, TU Braunschweig Slide 10

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Submission

Tilted Array

Simulation Results – Grating Lobes

• 300 GHz Pattern

• Array

– Grating lobes

– Spacing bigger than half of the

wavelength

Parameter Size

B 3.0 mm (horn width)

C 1.0 mm (horn height)

spacing 1.25 mm= C + 0.25 mm

Page 11: July 2017 Project: IEEE P802.15 Working Group for Wireless ......Slide 1 Sebastian Rey, TU Braunschweig July 2017 doc.: IEEE 802.15--17 -0396 00 0thz Submission Project: IEEE P802.15

Sebastian Rey, TU Braunschweig Slide 11

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Outline

• TERAPAN Framework

• Phased Array Antenna at 300 GHz

• Performance in Simulations

• Measurement Results

• Summary

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Sebastian Rey, TU Braunschweig Slide 12

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Submission

Antenna Scanner Setup

• inhouse made antenna

scanner in a semi-

anechoic chamber at

PTB in Braunschweig

• Vector network analyzer

Rohde & Schwarz ZVA

50 with frequency

extensions ZV-Z325

• S12 is recorded and

analyzed

• Known reference horn on

port 1, single element of

the phased array at port 2

• Measurement bandwidth

10 Hz, 220 – 325 GHz in

5 GHz steps, angular

range +/- 90 degree

frequency

extension

Computer

fixed

mount

AUT

VNA

Reference Horn

Antenna

frequency

extension

rotating

arm

AUT: Antenna

Under Test

Measurements of the array as a whole:

• No 5 port VNA at 300 GHz available

• with TERAPAN 4 Channel Rx/Tx-Modules

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Sebastian Rey, TU Braunschweig Slide 13

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Submission

Antenna Patterns – Outer Elements

– Measurements match the simulation very well

• Less than 0.6 dB mean error for horizontal patterns, standard deviation <1.35 dB

• Less than 1.2 dB mean error for vertical patterns, standard deviation < 3.3dB

– Restricted to -45…45 deg. (horizontal)/45...135 deg. (vertical)

• Mean error below 0.75 dB/1.6 dB with a standard deviation <0.4 dB/1.3 dB

horizontal vertical

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Sebastian Rey, TU Braunschweig Slide 14

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Submission

Antenna Patterns – Inner Elements

– Measurements match the simulation very well

• Less than 0.3 dB mean error for horizontal patterns, standard deviation <0.82 dB

• Less than 1.1 dB mean error for vertical patterns, standard deviation < 3.5dB

– Restricted to -45…45 deg. (horizontal)/45...135 deg. (vertical)

• Mean error below 0.4 dB/1.6 dB with a standard deviation <0.3 dB/1.2 dB

horizontal vertical

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Sebastian Rey, TU Braunschweig Slide 15

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Submission

Antenna Patterns – Frequency

– Measurements match the simulation very well

• Increasing directivity with frequency

• (Increasing gain with frequency)

vertical horizontal

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Sebastian Rey, TU Braunschweig Slide 16

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Submission

Antenna Matching

• Setup

– Single

Element is

aligned to the

direct path

(0°).

– VNA Sweep in

5 GHz steps

• S11 is below -20

dB for each

antenna element:

excellent matching

Page 17: July 2017 Project: IEEE P802.15 Working Group for Wireless ......Slide 1 Sebastian Rey, TU Braunschweig July 2017 doc.: IEEE 802.15--17 -0396 00 0thz Submission Project: IEEE P802.15

Sebastian Rey, TU Braunschweig Slide 17

July 2017 doc.: IEEE 802.15--17-0396-00-0thz

Submission

Demonstration of Beam Steering at

NGMN IC&E 2016

Demo at NGMN IC&E 2016

• 60 cm distance

• single transmitter

• 4 channel receiver with

phased array antenna

• electronic beam steering

shown and verified by

mechanical rotation

• QPSK modulation

• data rate of 12 Gbit/s (to

see data transmission even

within a side lobe)

• Local oscillator generated

by DDS modules

Page 18: July 2017 Project: IEEE P802.15 Working Group for Wireless ......Slide 1 Sebastian Rey, TU Braunschweig July 2017 doc.: IEEE 802.15--17 -0396 00 0thz Submission Project: IEEE P802.15

Sebastian Rey, TU Braunschweig Slide 18

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Submission

Summary

• Requirements for 300 GHz antennas have been briefly reviewed

• A phased array with horn elements has been introduced

• Simulation and measurement results have been shown

• References:

– S. Rey, T. Merkle, A. Tessmann, and T. Kürner, “A phased array antenna

with horn elements for 300 GHz communications,” in Proceedings

International Symposium on Antennas and Propagation (ISAP), pp. 122–

123, 2016.

– S. Rey, D. Ulm, T. Kleine-Ostmann, and T. Kürner, “Performance evaluation

of a first phased array operating at 300 GHz with horn elements,” in

Proceedings of the 11th European Conference on Antennas and

Propagation (EUCAP), pp. 1629–1633, 2017.

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Sebastian Rey, TU Braunschweig Slide 19

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Submission

Vielen Dank für

Ihre Aufmerksamkeit.

Thank you for paying attention!