Harlan Howe

Published June 6, 2006 In an effort to better combine the editorial content of our magazine with our newly developed and retooled on-line presence, we have decided to expand Harlan's RF and microwave engineering advice into a monthly feature that appears in Microwave Journal. Harlan has selected one question...

Published May 30, 2006 From: Trevor Baker, Coffey I need a device that can transmit and receive information data. This device would be installed inside a house but needs to be able to transmit multiple miles. Is there such a device? Would a relay point extend the transmittable distance?...

Published May 8, 2006 In an effort to better combine the editorial content of our magazine with our newly developed and retooled on-line presence, we have decided to expand Harlan's RF and microwave engineering advice into a monthly feature that appears in Microwave Journal. Harlan has selected one question...

Published May 3, 2006 From: Hasan Ajam, Faramoj I have a question regarding quality factor of varactor diodes at different frequencies. In the data sheet of varactor diodes the quality factor is determined only at one frequency. What is their quality factor at other frequencies? Dear Hasan, You have...

Harlan Howe relies upon his 34 years of experience to answer your questions on RF and Microwave engineering.

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Harlan's most recent question:

Q: I am trying to design a microstrip or CPW coupler from 2 to 18 GHz. I was thinking of either a multisection branch line coupler or a multisection coupled line coupler, but I would like to know your opinion. Which is the best solution for such a wideband coupler?

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Published March 1, 2006 In an effort to better combine the editorial content of our magazine with our newly developed and retooled on-line presence, we have decided to expand Harlan’s RF and microwave engineering advice into a monthly feature that appears in Microwave Journal. Harlan has selected one question...

Harlan Howe relies upon his 34 years of experience to answer your questions on RF and Microwave engineering.

Harlan's most recent question:

Q: I have designed a 1.5 to 1.8 GHz low noise amplifier. When I put a lid on its cavity, the input VSWR changes to 1.3 to 1.5 GHz. Do you know why this happens?

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Harlan Howe relies upon his 34 years of experience to answer your questions on RF and Microwave engineering.

Harlan's most recent question:

Q: Could you provide details of the various divider networks used in microstrip patch antennas? I am trying to design a microstrip patch array for 2.4 GHz and 19 dBi gain. From a single patch, I get a gain of around 9 dBi. Do I need to go to an array configuration? What method do you suggest should be used to combine the patch elements?

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