Broadband high efficiency circularly polarized active integrated antenna

Yi Qin; Steven Gao; Michael Elsdon; Alistair Sambell

doi:10.1109/APMC.2005.1606698

Broadband high efficiency circularly polarized active integrated antenna

Yi Qin, Steven Gao, Michael Elsdon, Alistair Sambell

Research output: Contribution to conference › Paper › peer-review

Abstract

This paper presents a broadband high efficiency circularly polarized active antenna integrated with class-E power amplifier (PA) at 2GHz. A single circular microstrip patch fed by a cross slot is employed as not only a broadband circularly polarized radiator but also as a harmonics-termination load network, which is directly connected with the class-E power amplifier output. A low cost PCB technology is employed in the circuit fabrication and a low voltage PHEMT transistor is used. A peak drain efficiency of 71.1% for the class-E amplifier is measured at 2.05GHz, together with a maximum radiated power of 28.2 dBm from the active integrated antenna (AIA). A power added efficiency (PAE) over 50% within a 17% bandwidth from 1.92GHz to 2.28GHz is achieved. Axial ratio below 3 dB is obtained over a 9% bandwidth from 1.99 GHz to 2.18 GHz.

Original language	English
DOIs	https://doi.org/10.1109/APMC.2005.1606698
Publication status	Published - Dec 2005
Event	APMC 2005: 17th Asia-Pacific Microwave Conference - Suzhou, China Duration: 1 Dec 2005 → …

Conference

Conference	APMC 2005: 17th Asia-Pacific Microwave Conference
Period	1/12/05 → …

Keywords

UHF power amplifiers
active antennas
broadband antennas
microstrip antennas
polarisation
power HEMT
slot antennas

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10.1109/APMC.2005.1606698

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title = "Broadband high efficiency circularly polarized active integrated antenna",

abstract = "This paper presents a broadband high efficiency circularly polarized active antenna integrated with class-E power amplifier (PA) at 2GHz. A single circular microstrip patch fed by a cross slot is employed as not only a broadband circularly polarized radiator but also as a harmonics-termination load network, which is directly connected with the class-E power amplifier output. A low cost PCB technology is employed in the circuit fabrication and a low voltage PHEMT transistor is used. A peak drain efficiency of 71.1\% for the class-E amplifier is measured at 2.05GHz, together with a maximum radiated power of 28.2 dBm from the active integrated antenna (AIA). A power added efficiency (PAE) over 50\% within a 17\% bandwidth from 1.92GHz to 2.28GHz is achieved. Axial ratio below 3 dB is obtained over a 9\% bandwidth from 1.99 GHz to 2.18 GHz.",

keywords = "UHF power amplifiers, active antennas, broadband antennas, microstrip antennas, polarisation, power HEMT, slot antennas",

author = "Yi Qin and Steven Gao and Michael Elsdon and Alistair Sambell",

year = "2005",

month = dec,

doi = "10.1109/APMC.2005.1606698",

language = "English",

note = "APMC 2005: 17th Asia-Pacific Microwave Conference ; Conference date: 01-12-2005",

}

TY - CONF

T1 - Broadband high efficiency circularly polarized active integrated antenna

AU - Qin, Yi

AU - Gao, Steven

AU - Elsdon, Michael

AU - Sambell, Alistair

PY - 2005/12

Y1 - 2005/12

N2 - This paper presents a broadband high efficiency circularly polarized active antenna integrated with class-E power amplifier (PA) at 2GHz. A single circular microstrip patch fed by a cross slot is employed as not only a broadband circularly polarized radiator but also as a harmonics-termination load network, which is directly connected with the class-E power amplifier output. A low cost PCB technology is employed in the circuit fabrication and a low voltage PHEMT transistor is used. A peak drain efficiency of 71.1% for the class-E amplifier is measured at 2.05GHz, together with a maximum radiated power of 28.2 dBm from the active integrated antenna (AIA). A power added efficiency (PAE) over 50% within a 17% bandwidth from 1.92GHz to 2.28GHz is achieved. Axial ratio below 3 dB is obtained over a 9% bandwidth from 1.99 GHz to 2.18 GHz.

AB - This paper presents a broadband high efficiency circularly polarized active antenna integrated with class-E power amplifier (PA) at 2GHz. A single circular microstrip patch fed by a cross slot is employed as not only a broadband circularly polarized radiator but also as a harmonics-termination load network, which is directly connected with the class-E power amplifier output. A low cost PCB technology is employed in the circuit fabrication and a low voltage PHEMT transistor is used. A peak drain efficiency of 71.1% for the class-E amplifier is measured at 2.05GHz, together with a maximum radiated power of 28.2 dBm from the active integrated antenna (AIA). A power added efficiency (PAE) over 50% within a 17% bandwidth from 1.92GHz to 2.28GHz is achieved. Axial ratio below 3 dB is obtained over a 9% bandwidth from 1.99 GHz to 2.18 GHz.

KW - UHF power amplifiers

KW - active antennas

KW - broadband antennas

KW - microstrip antennas

KW - polarisation

KW - power HEMT

KW - slot antennas

UR - https://www.scopus.com/pages/publications/33847173425

U2 - 10.1109/APMC.2005.1606698

DO - 10.1109/APMC.2005.1606698

M3 - Paper

T2 - APMC 2005: 17th Asia-Pacific Microwave Conference

Y2 - 1 December 2005

ER -

Broadband high efficiency circularly polarized active integrated antenna

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