Kenichi Maruhashi

TX and RX Front-Ends for 60GHz Band in 90nm Standard Bulk CMOS

This paper describes the design of a mm-wave power amplifier PA with reliability considerations for hot carrier injection (HCI) degradation. A 60GHz-band single-chip transmitter front- end with an output power of 6dBm for 2.6 Gb/s QPSK modulation and a single-chip receiver front-end are implemented in a standard IV 90 nm CMOS technology.

1.25 Gbps wireless Gigabit ethernet link at 60 GHz-band

A 1.25 Gbps 60 GHz-band full duplex wireless Gigabit Ethernet link has been developed. Direct ASK modulation and demodulation scheme is adopted for the 60 GHz-band transceiver. CPW MMICs and planar filters are flip-chip mounted in TX and RX LTCC MCMs. The wireless Gigabit Ethernet link has the function of converting an optical fiber link to a wireless link seamlessly combining a 60 GHz-band transceiver with a 1000Base-SX optical in/out module. The size is 159/spl times/97/spl times/44 mm/sup 3/.

Wireless uncompressed-HDTV-signal transmission system utilizing compact 60-GHz-band transmitter and receiver

A wireless uncompressed high-definition television (HDTV) signal transmission system utilizing a 60-GHz-band transmitter and two receivers is proposed and developed for indoor use. The system is capable of transmitting video signals with 1080i/720p formats and stereo audio signals as 1-Gb/s serial data stream. The compact transmitter and receiver are highlighted, each size of which is 50 mm /spl times/ 70 mm /spl times/ 15 mm. An output peak power of 10 mW and a minimum received power of -52 dBm are achieved. The wide-beam planar antennas allow less strict alignment for the wireless equipments with a maximum transmission distance of 7 m. Furthermore, path diversity technique is introduced to reduce the opportunities of shadowing by a human body around a television set.

Design and performance of a Ka-band monolithic phase shifter utilizing nonresonant FET switches

This paper describes design consideration and performance of a Ka-band monolithic phase shifter utilizing nonresonant FET switches. The switches show broad-band on/off characteristics up to 60 GHz without using inductors; thus, robust circuit design is possible for a switched-line phase shifter. To determine circuit topology, we introduce a schematic design approach. As a result, desired phase shift as well as good matching characteristics can be realized. The developed 4-bit monolithic phase shifter demonstrates an overall phase deviation less than 5/spl deg/ rms and an insertion loss variation less than 0.65 dB rms from 33 to 35 GHz. For all 16 states, the insertion loss is measured to be 13.1/spl plusmn/1.1 dB and the VSWR is less than 1.6. The chip size of the monolithic phase shifter is 2.5 mm/spl times/2.2 mm.

A 60 GHz-band planar dielectric waveguide filter for flip-chip modules

A planar dielectric waveguide filter with CPW I/O ports suitable for flip-chip bonding is proposed and demonstrated for 60 GHz-band applications. The filter is formed incorporating via holes in an alumina substrate. In order to improve a stop-band rejection, short-circuited CPW resonators with half wavelength are added to waveguide-to-CPW transitions. A fabricated 4-resonator filter exhibits an insertion loss of 2.8 dB with a 3 dB-bandwidth of 3.0 GHz and a rejection of 35 dB at a 3 GHz-lower-separation from a center frequency of 58.5 GHz. The filter is successfully mounted in a multi-layer ceramic package using flip-chip bonding.

Multiple Sector ID Capture (MIDC): A Novel Beamforming Technique for 60-GHz Band Multi-Gbps WLAN/PAN Systems

A novel beamforming (BF) technique (MIDC: Multiple sector-ID Capture) is proposed for 60-GHz band WLAN/PAN systems. In contrast to conventional BF techniques adopted in 60-GHz band standards, where quasi-omni (Q-omni) antenna radiation patterns are utilized, MIDC precisely detects the best link even when the Q-omni pattern is imperfect. Furthermore, it can reserve multiple antenna settings corresponding to existing communication links in the initial training by making use of the quasi-optical nature of millimeter-waves. This enables fast beam switching when link blockage occurs. The training is executed in short durations by putting together DoA/DoD-estimation and “beam-combining” techniques. The basic function of MIDC is verified experimentally in a simple multipath propagation environment by using our 60-GHz CMOS transceiver LSIs integrated with planar phased-array antennas. MIDC has been adopted in the MAC/PHY specification of the primary 60-GHz band standards: WiGig (Wireless Gigabit Alliance) and IEEE 802.11ad.

A 60-GHz band CMOS phased array transmitter utilizing compact baseband phase shifters

A 60-GHz band phased array transmitter is developed based on 90-nm CMOS process featuring compact baseband phase shifters with ideally zero power consumption. The phase shifter changes an RF signal phase every π/2 by switching baseband signal paths. The transmitter has 6 RF front-ends and 6 phase shifters to implement beam steering function for a 1 × 6 array antenna system. Each of the RF front-ends exhibits typically a power of 0 dBm at 1-dB compression point, a conversion gain of 15 dB, and a 3-dB bandwidth of 600 MHz. By controlling phase shifters, the beam steering from 0 to 60 degree is observed. The chip size is 5 mm × 2.5 mm. The circuit consumes 960 mW at 1.0 V supply.

A 60-GHz-band planar dielectric waveguide filter for flip-chip modules

A planar dielectric waveguide filter with CPW I/O ports suitable for flip-chip bonding is proposed and demonstrated for 60 GHz-band applications. The filter is formed incorporating via holes in an alumina substrate. In order to improve a stop-band rejection, short-circuited CPW resonators with half wavelength are added to waveguide-to-CPW transitions. A fabricated 4-resonator filter exhibits an insertion loss of 2.8 dB with a 3 dB-bandwidth of 3.0 GHz and a rejection of 35 dB at a 3 GHz-lower-separation from a center frequency of 58.5 GHz. The filter is successfully mounted in a multi-layer ceramic package using flip-chip bonding.

A 60 GHz MMIC stabilized frequency source composed of a 30 GHz DRO and a doubler

This paper presents a 60 GHz highly stabilized frequency source, which is composed of a 30 GHz DRO and a doubler based on 0.15 /spl mu/m gate AlGaAs/InGaAs HJFET MMIC technologies. The 30 GHz DRO exhibited low phase noise of -102 dBc/Hz at 100 kHz off-carrier with the maximum output power of 7.7 dBm. The 30-to-60 GHz doubler showed high conversion gain of -1.5 dB at the input power of 7 dBm. For the 60 GHz frequency source, markedly low phase noise of -93 dBc/Hz at 100 kHz off-carrier and better than 1.9 ppm/C frequency stability has been achieved.<<ETX>>

Wireless 1.25 Gb/s transceiver module at 60 GHz-band

A 1.25 Gb/s 60 GHz-band compact transceiver module uses ASK modulation. CPW MMICs and planar filters are flip-chip mounted in TX and RX LTCC MCMs. The transmitter exhibits 9.6 dBm output power. The receiver shows -50 dBm minimum received power for 1.25 Gb/s error-free transmission. The transceiver module is 82/spl times/53/spl times/7 mm/sup 3/ (30 cc).