An I/Q modulator for wireless applications

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Date: Jan. 1997
From: Microwave Journal(Vol. 40, Issue 1)
Publisher: Horizon House Publications, Inc.
Document Type: Article
Length: 785 words

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The model RFIQ-19-SM20 is one of a new family of I/Q modulators designed and manufactured using the patented Blue Cell process. The modulator is designed for use in wireless communication systems in the personal communications service (PCS) frequencies of 1850 to 1910 MHz (transmit) and 1930 to 1990 MHz (receive). Also available in this product line are modulators designed for use in the 1800 MHz European digital communications system (DCS), 900 MHz cellular communication systems and wireless local loop systems in the 2400 MHz industrial, scientific and medical (ISM) band. The bidirectional nature of the design allows the devices to be used as both modulators and demodulators.

Responding to several large original equipment manufacturers' requests to provide a low cost, highly repeatable I/Q modulator with sideband carrier suppression unavailable previously in a small surface-mount component, the design goals of 10 dB (max) conversion loss, carrier rejection greater than 25 dB, sideband suppression greater than 30 dB and third-harmonic suppression better than 40 dB were attained easily using the in-house design techniques for thick-film, multilayer, planar technology. The modulator measures approximately 0.50[inch] square and 0.13[inch] high. The low profile, compact size makes this family ideally suited to...

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Gale Document Number: GALE|A19161441