I am passing along the following message from Bob Greeth, G4HFQ, for general interest. The documentation for the polar plot program can be downloaded from Bob's site, in case anyone would wish to hav
I have updated the item on LPCAD LPDA Designs and NEC Models by adding a further note at the end. In addition, I have recently added 2 other LPDA items to the modeling section of the index: one on sp
I have updated the main page of my site to reflect the announcement of the new book, Basic Antenna Modeling: A Hands-On Tutorial, which will be available from Nittany Scientific after October 31. The
I have added to the site, under the LPDA collection, some notes comparing Vee-element and straight element LPDA designs and on the effect of element diameter, comparing #14 wire and 0.5" tubing eleme
Since Sept 1 (official retirement date) I have updated a few things at the site, including the latest columns in the An-Ten-Ten-nas, Antennas Also, I have updated the "Phased Yagi" VHF entry to inclu
Charlie, There may be nothing wrong with the model. However, it appears to be set up over perfect ground. The gain of the system in these conditions can be estimated by comparing it with a model over
I have just added a note (in the modeling section of the index) on translating LPDA designs from LPCAD (Roger Cox's very popular program) into NEC models. From some correpondence and reading over the
The small beams series that I initially scanned has now been replaced with HTML texts for easier reading and faster downloading. I have had to use scanned figures, so they will not be as crisp as oth
I have had a number of inquiries about possibilities for developing a multi-band antenna from a core Moxon rectangle. There is now a note--in the Moxon index page listed on the main page--on a couple
I have placed some initial notes on modeling the dual rhomboid (the Laport rhombic) at my site. Part 1 restricts itself to modeling issues and the version of the antenna from QST, Mar, 1997. I hope t
I have added two additional notes to the dual rhomboid collection--one on versions "closer" to the Laport dimensions and the other on standard of comparison for the dual rhomboid. I hope they are use
This is Aug. 20, the second anniversary of adding the counter to my site. Year 1 brought about 30,000 visits to the site. Right now, the counter reads 89,600+, meaning another 59,000 visits to the si
Cat is out of the bag. With retirement, I shall be moving my site. Actually, I already have, but have not tested every item in the collection. The new URL will be easier to remember: http://www.cebik
on a 60' boom (18.25 m) is now in the air, with a few improvements over his last report to me. So I have added his latest dimensions, NEC-4 performance predictions, and a photograph of the completed
Several requests and strong feedback from the original CQ article (a sort of tutorial for newcomers to antenna patterns as derived from models) has led me to place a revised version of the item on Ge
In cleaning out some old files that date back to when I served as Assistant Dean for Research at UTK, I ran into the following item that will clarify many discussions you encounter in science and eng
I get requests for parts of the "Modeling and Understanding Small Beams" that appeared between 1995 and 97 in Communications Quarterly. As well, a number of the notes at the site are updates on or ex
After distributing the Keys to Understanding Scientific Discussion and Literature, I received a wonderful array of appreciative notes, equally divided between those who vaguely remembered the list an
I have update the notes on DE+Dir Yagis, with 17-12 meter combined designs by adding a longer boom combo with an extra dB gain on 12 meters (about 7.2 dBi F.S.) to go with the shorter boom models. Ju
As an interesting exercise in self-edification, I put together a small item in the VHF section of the index called "Phased Yagis, EDZ Beams, and Landsdorfer-Sacher Yagis," which looks at their proper